永和工芸 Product Lineup

The client has asked if the paint contains PFAS. Are you unsure about what to investigate and how to respond? 【What is happening now】 In May 2026, a government ordinance will be promulgated, adding long-chain PFCA and related substances to the list of Class I specified chemical substances under the Chemical Substances Control Law starting November 22. PFOS, PFOA, and PFHxS are already prohibited from being manufactured or imported in principle. 【Things to confirm first】 □ Does the paint you are using contain fluorinated components? □ Do you have the SDS or proof of content from the paint manufacturer on hand? □ Which substances is the client inquiring about? 【Measures you can take starting today】 1. Update the SDS for each paint to the latest version. 2. For any unclear points, confirm in writing with the paint manufacturer whether the substances are present. 【Free materials】 We have compiled the standards for quality control and record-keeping in painting in the related catalog "Eiwa Kogei_Paint Quality Control Guidelines_Process Management Standards." You can download it for free from this page.

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Although I hear that crude oil and raw materials have decreased, the prices of paint remain high. Estimates for painting are also not returning to previous levels. 【What is happening now】 The benchmark price for domestic naphtha reached a record high of 118,900 yen per kiloliter for the April to June period. It is expected to decrease to 104,800 yen for the July to September period and 95,900 yen for the October to December period. Nevertheless, the price index for paint in September is 26.8 percent higher compared to the same month last year. 【Why it doesn't decrease】 □ Raw material prices are reflected in product prices with a delay of several months. □ Once the shipping price of paint rises, it tends to be difficult to return to previous levels quickly. 【Things to confirm before placing an order】 1. The validity period of the estimate and the conditions for reviewing the price. 2. Request a separate estimate for paint costs and processing fees. 【Free materials】 We have compiled a comprehensive system from pre-treatment to painting in the related catalog "Eiwa Kogei Consistency Catalog." It can be downloaded for free from this page.

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I hear that the spring shortage has settled down, but the delivery times for paint have not returned to normal. Are you having trouble trying to request urgent painting? 【What is happening now】 As of September, the situation for acquiring thinner is gradually improving. On the other hand, according to a report from the Ministry of Economy, Trade and Industry, naphtha imports in August 2026 were 77.8 percent of the same month the previous year, and overall supply was at 87.4 percent. The raw materials for paint are still being supplied in smaller quantities than the previous year. 【Common issues on the ordering side】 □ The more specific the color or the more specialized the paint, the longer it takes to arrive. □ The more urgent the request, the more challenging it becomes to arrange for paint. 【Countermeasures you can take starting today】 1. Decide whether to allow alternative brands for specified paints. 2. For urgent parts, consult about colors that have paint in stock. 【Free materials】 We have compiled the details of our baking paint services in the related catalog "Baking Paint Services." You can download it for free from this page.

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Only the parts baked on winter mornings lack luster. When lined up with the afternoon parts, the difference is clearly noticeable. 【First, please look here】 □ Parts immediately after startup have lower luster 　→ They are being processed before the furnace reaches the set temperature □ Only the parts close to the furnace entrance have low luster 　→ They cool down with outside air, causing uneven temperatures inside the furnace □ Parts with low luster feel somewhat soft to the touch 　→ They have insufficient curing, and the coating has not fully solidified 【Why does this happen?】 In winter, the outside air is cold, and it takes longer for the furnace to warm up compared to summer. Even if the thermometer shows the set value, it does not guarantee that the entire furnace is warm. 【Countermeasures that can be implemented starting today】 1. Extend the furnace startup time during winter 2. For the first parts, check the luster and hardness with a test plate before processing 3. Record the temperature at different locations inside the furnace 【Free materials】 We have compiled the response details for baking paint in the related catalog "Baking Paint Services." You can download it for free from this page.

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Since it has gotten cold, small holes have been increasing on the painted surfaces. The paint and gun settings should be the same as in summer. 【First, please look here】 □ Common on parts painted immediately after being taken out of the warehouse 　→ There is invisible condensation on the surface of the cooled parts □ Holes appear after baking, and the surface looks clean right after painting 　→ Trapped moisture expands with heat and creates holes in the paint film □ Concentrated around castings and welded areas 　→ Moisture that has entered the gaps has not completely evaporated 【Why it happens】 When cooled parts are moved to a warm place, tiny water droplets form on the surface. If painted over, the moisture expands with the heat from baking, creating holes in the paint film. 【Countermeasures that can be implemented starting today】 1. Bring parts into the painting area the day before to acclimate to the temperature 2. Check the surface temperature of the parts before painting 3. Preheat castings and welded items to evaporate moisture before painting 【Free Material】 We have compiled how to identify painting troubles, including holes, in the related catalog "Eiho Kogei_Painting Trouble Introduction_Identification and Countermeasure Guide." It can be downloaded for free from this page.

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It seems that only the parts painted in winter rust faster. The appearance of the paint is no different from summer. 【First, please look here】 □ The color after chemical treatment is lighter and mottled than usual. 　→ The liquid temperature has dropped, and the film has not formed sufficiently. □ Parts treated first thing in the morning are more prone to rust. 　→ They are being processed before the temperature of the treatment tank has fully risen. □ Rust spreads from underneath the paint film. 　→ The rust prevention capability of the substrate has weakened. 【Why does this happen?】 Chemical treatments like zinc phosphate vary in film formation depending on the liquid temperature. When the liquid temperature is low, the film becomes thin and uneven, making it easier for rust to spread underneath the paint film. 【Countermeasures you can take starting today】 1. Measure and record the temperature of the treatment tank at the start of work and at noon. 2. Compare the color after chemical treatment with a sample to confirm. 3. In winter, start heating the tank earlier. 【Free Materials】 We have compiled the standards for process management, including chemical treatment, in the related catalog "Eiwa Kogei_Paint Quality Control Guidelines_Process Management Standards." You can download it for free from this page.

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Only the parts painted on a cold morning have a rough surface. Despite using the same paint and settings, the finish varies. 【First, please look here】 □ Paint applied first thing in the morning tends to be rough 　→ Cold paint becomes more viscous, resulting in a coarser mist □ Using cans taken directly from the warehouse 　→ The paint temperature remains lower than that of the painting area □ Measuring viscosity using the same standards as in summer 　→ Even with the same timing, the paint's condition changes with temperature 【Why does this happen?】 When the temperature drops, paint becomes more viscous and spreads less evenly. If the mist is coarse when it adheres to the surface, it leaves a rough texture and unevenness. 【Countermeasures you can implement starting today】 1. Place the paint in the painting area the day before to equalize the temperature 2. Measure and record the temperature and viscosity of the paint before use 3. Reassess viscosity standards for each season 【Free Resource】 We have compiled the management standards for paint temperature and viscosity in the related catalog "Eiwa Kogei_Paint Quality Control Guidelines_Process Management Standards." You can download it for free from this page.

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In winter, the number of blemishes on the painted surface suddenly increases. Despite cleaning the booth as usual, they do not decrease. 【First, please look here】 □ Blemishes gather at the corners and edges of parts 　→ Dust is attracted by static electricity □ There are many near places touched by work clothes 　→ Dry air causes clothes and gloves to become charged □ More common on dry, sunny days 　→ The lower the humidity, the more static electricity accumulates 【Why it happens】 In the dry winter air, static electricity is generated just by objects rubbing against each other. Charged parts attract fine dust in the air. 【Countermeasures you can implement starting today】 1. Perform air blowing and static elimination before painting 2. Use work clothes that are less likely to become charged 3. Record the humidity in the painting area to prevent excessive dryness 【Free materials】 We have compiled how to identify painting troubles that include blemishes in the related catalog "Eiwa Kogei_Painting Trouble Introduction_Identification and Countermeasure Guide." You can download it for free from this page.

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The parts painted on a cold day are still sticky the next day. Are you shipping them with the same drying time as in summer? 【First, please check here】 □ Using a two-component paint and drying it at room temperature 　→ When the temperature is low, the reaction between the base and hardener slows down. □ Parts painted in the evening are stickier 　→ The cooling at night prevents proper drying. □ Adding too much hardener 　→ The mixing ratio becomes unbalanced, making it harder to cure. 【Why does this happen?】 Many two-component paints specify to avoid painting at temperatures below 5 degrees Celsius. Drying at room temperature is influenced by the seasonal temperatures. 【Measures you can take starting today】 1. Check the specifications of the paint for the minimum temperature and drying time. 2. In winter, extend the drying time or use heat to dry. 3. Consider using powder coating, which is less affected by temperature. 【Free Materials】 The details of powder coating services are summarized in the related catalog "Powder Coating Services." You can download it for free from this page.

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In summer, there were no issues, but since it has gotten colder, the peeling has increased. Even though neither the paint nor the application method has changed, why is this happening? 【First, please take a look here】 □ Parts processed first thing in the morning tend to peel more 　→ The degreasing solution cools overnight and hasn’t fully warmed up □ Only parts with a lot of oil are peeling 　→ The liquid temperature has dropped, weakening its ability to remove oil □ When water is applied, it beads up 　→ This is a sign that oil remains on the surface 【Why does this happen?】 The degreasing solution only exhibits its true power at a specified temperature. When the air temperature drops, the liquid temperature also drops, and the oil cannot be fully removed in the same amount of time. 【Countermeasures that can be implemented starting today】 1. Measure and record the temperature of the degreasing solution at the start of the workday 2. Start heating earlier during winter 3. Check for water beading daily through sampling 【Free materials】 We have compiled a consistent system from pre-treatment to painting in the related catalog "What Can Be Done with Consistent Painting." It can be downloaded for free from this page.

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To reduce material costs, I would like to replace the parts' materials with iron. However, aren't you worried about rust if you switch to iron? 【What is happening now】 In the corporate price index for August 2026, non-ferrous metals rose by 43.3 percent compared to the previous year. Prices continue to rise, particularly for copper, leading to an increase in considerations for material reviews. 【Points to check when switching to iron】 □ Is the location indoors or outdoors? 　→ If outdoors, a combination of chemical treatment and painting is essential. □ Does the shape have many corners or holes? 　→ Corners will have a thinner film thickness, becoming a starting point for rust. □ Is it acceptable if the weight changes? 【How to assemble rust prevention】 1. Include chemical treatment such as zinc phosphate in the pre-treatment. 2. If in a harsh environment, apply paint over zinc plating. 【Free materials】 We have compiled the combinations of chemical treatment, zinc plating, and painting in the related catalog "What Eiwa Can Do for Metal Coating." You can download it for free from this page.

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I suddenly received a notification that the painting subcontractor I had relied on for many years was going out of business. Such news is no longer someone else's problem. 【What is happening now】 According to a survey by Tokyo Shoko Research, there were 48 bankruptcies in the painting construction industry from January to April 2026. This is 26.3 percent more than the same period last year, with rising costs of materials like thinner and the difficulty of passing on those costs being contributing factors. The data mainly focuses on building painting, but smaller painting companies are more susceptible to the impact of rising material costs. 【Be cautious in this situation】 □ Relying on only one painting company □ The conditions for painting are not documented □ Jigs and color samples are only available from the subcontractor 【Preparations you can start today】 1. Document color numbers, film thickness, and baking conditions in writing 2. Conduct a trial with a second company to verify if the finish is the same 【Free materials】 We have compiled a comprehensive system from pre-treatment to painting in the related catalog "Eiwa Kogeis Consistency Catalog." You can download it for free from this page.

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When interest rates rise, what happens to the prices of paint and coatings? This is a point you want to know before obtaining estimates for outsourcing costs. 【What is happening now】 On September 18, 2026, the Bank of Japan raised the policy interest rate to 1.25 percent. The yen exchange rate strengthened to the 152 yen range per dollar in mid-September, compared to the 159 yen range at the end of August. 【Impact on paint】 □ The raw materials for paint and thinners are imported in dollars. 　→ A stronger yen works to lower the import costs of raw materials. □ However, domestic corporate prices rose by 7.6 percent year-on-year in August. 　→ It is unlikely that paint prices will decrease immediately. 【Things to confirm before placing an order】 1. The validity period of the estimate and the conditions for price revisions. 2. Whether alternative brands are accepted in place of specified paints. 【Free materials】 The details of the baking paint service are summarized in the related catalog "Baking Paint Service." You can download it for free from this page.

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I want to add color while keeping the metallic texture as it is. Are you worried that regular painting will hide the base material? 【What is Color Clear Coating?】 It is a transparent coating with color that allows the base metal to show through. It is suitable for decorative parts that utilize the texture of stainless steel and aluminum. 【Three Conditions That Determine the Finish】 □ Method of polishing the base 　→ Scratches and their direction will be visible as they are. □ Quality of degreasing 　→ If oil remains, it will cause color unevenness and repelling. □ Film thickness 　→ The thicker it is, the darker the color will be, leading to differences between parts. 【Points to Consider When Making a Request】 1. Specify the color sample and the finish of the base together. 2. Confirm the color intensity with a test application before mass production. 【Free Materials】 We have compiled a painting menu that includes color clear coating in the related catalog "What Eiwa Can Do for Metal Coating." It can be downloaded for free from this page.

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When touching the received painted parts, the surface feels slightly sticky. When stacked, the parts stuck to each other. 【Checks to Perform Upon Receipt】 □ Pressing with a fingernail leaves a mark 　→ The paint film has not fully cured □ Rubbing with a cloth soaked in thinner transfers color 　→ The baking temperature or time was insufficient □ Only the thick parts are sticky 　→ The baking process finished before the parts were fully heated 【Why This Happens】 Baked paint only hardens at the specified temperature and time. Even if the oven settings are correct, it will not cure if the temperature of the parts has not increased. 【Countermeasures to Implement Starting Today】 1. Request records of baking temperature and time from the subcontractor 2. Perform rub checks randomly upon receipt 3. For thick parts, have separate baking conditions established 【Free Resource】 The management standards for baking conditions are compiled in the related catalog "Eiwa Kogei_Paint Quality Control Guidelines_Process Management Standards." This can be downloaded for free from this page.

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We received a report that rust has already appeared on the painted items that were just delivered. Why is it rusting so quickly despite being painted? 【First, please look here】 □ Rust is appearing from the corners and edges 　→ The corners have a thin layer of paint, and the film thickness is insufficient. □ Small dot-like rust is scattered across the surface 　→ Water is entering through pinholes in the paint film. □ Rust is spreading underneath the paint film 　→ There is no chemical treatment, and the rust prevention of the substrate is weak. 【Why does this happen?】 The paint film allows water to pass through thin areas and holes. Iron that has not undergone chemical treatment will rapidly rust from those points. 【Countermeasures that can be implemented starting today】 1. Specify chemical treatment such as zinc phosphate for iron parts. 2. Add corner beveling and check the film thickness at the corners. 3. Dry the items before packaging to prevent condensation. 【Free Material】 We have compiled a guide on how to identify painting troubles that include rust in the related catalog "Eiwa Kogei_Painting Trouble Introduction_Identification and Countermeasure Guide." It can be downloaded for free from this page.

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Before painting, there were no issues, but after painting, the parts do not fit. Did you notice this for the first time on the assembly line and are you in a hurry? 【First, please check here】 □ Pins or bolts do not fit into the holes 　→ The inner sides of the holes have paint film, reducing the diameter □ Only the fitting surfaces are tight 　→ The fitting areas were not masked □ Depending on the lot, some fit and some do not 　→ There is a large variation in film thickness 【Why does this happen?】 The diameter of the holes becomes smaller by twice the thickness of the paint film. Even a slight thickness can affect parts where fitting precision is critical. 【Countermeasures you can implement starting today】 1. Indicate the masking surfaces and holes on the drawings 2. Specify the upper limit of film thickness with numbers 3. Confirm the fit with actual parts in the first lot 【Free materials】 We have compiled the management standards for film thickness and masking in the related catalog "Eiwa Kogei_Paint Quality Control Guidelines_Process Management Standards." You can download it for free from this page.

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When I opened the box of the painted product, there were scratches on the surface. Don't you think it's due to transportation? 【First, please look here】 □ Pressing with a nail leaves a mark 　→ Insufficient curing has left the paint film soft □ The pattern of the packaging material is imprinted on the paint surface 　→ It was packaged before it cooled completely □ All parts have scratches in the same location 　→ The packaging material or dividers are making contact 【Why does this happen?】 A paint film that has insufficient curing and cooling may appear dry but is prone to scratching. If the packaging makes contact in the same way, the same areas will rub against each other during transport. 【Countermeasures you can implement starting today】 1. Allow the product to cool to room temperature before packaging after curing 2. Use dividers that prevent parts from touching each other 3. Add a check by pressing with a nail upon receipt 【Free Resource】 We have compiled how to identify painting troubles, including scratches, in the related catalog "Eiho Kogei_Painting Trouble Introduction_Identification and Countermeasure Guide." You can download it for free from this page.

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The item was returned by the customer due to poor painting. There is no time to remake it, but it seems a waste to discard it as is. 【First, please check here】 □ Are there any scratches or deformations on the material itself? 　→ If the material is intact, it can be stripped and repainted. □ Is the defect only in the paint film, or has it progressed to rust? 　→ If there is rust, it will be removed after stripping. □ Do you know the original paint color number and film thickness? 　→ This will serve as a standard for repainting with the same specifications. 【Process from stripping to repainting】 1. Confirm the details and quantity of defects upon receipt. 2. Remove the old paint film using heat treatment or blasting, according to the material and shape. 3. Start over from the pre-treatment stage, repaint according to the original specifications, and conduct inspection. 【Eiwa Kogei's Response】 We carry out the stripping, pre-treatment such as chemical conversion coating, and painting consistently in-house. 【Free Material】 The scope of our response from stripping to repainting is summarized in the related catalog "What Can Be Done with Consistent Painting." It can be downloaded for free from this page.

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I want to urgently request painting, but I keep getting turned down by the contact points. When I ask for reasons, all I hear is "it's difficult for us." 【Three Conditions for Being Turned Down】 □ Too large or too small 　→ It won't fit the dimensions of the furnace or hanger. □ Small quantity, just prototypes 　→ It will halt the setup of the mass production line. □ Mixed materials or plated items 　→ Different pre-treatment is required for each material, necessitating separate lines. 【How to Make a Request That Is Less Likely to Be Turned Down】 1. Write the material, dimensions, weight, and quantity on the drawing. 2. Send the color number, gloss, and film thickness specifications together. 3. Communicate the timing for prototypes and mass production separately. 【Response from Eiwa Kogei】 We accommodate from small lots to mass production with three types of equipment, handling iron, stainless steel, aluminum, zinc die-cast, and magnesium. 【Free Materials】 We have compiled the sizes and processes of the parts we can handle in the related catalog "Baking Paint Service." You can download it for free from this page.

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When I used the paint that I had secured in abundance during spring, it had lumps. The color also looks slightly different from the previous batch. 【What is happening now】 In spring 2026, there were successive shipping restrictions and order suspensions for thinner and solvent-based paints. Is the paint secured at that time still sitting in the warehouse for a long time? 【First, please check here】 □ There is a hard sediment at the bottom of the can 　→ The pigment has settled and solidified □ Even after stirring, particles remain 　→ Some of the paint has started to solidify □ When opening the can, there is a film on the surface 　→ The surface has solidified due to exposure to air 【Countermeasures you can take starting today】 1. Write the arrival date on the can and use them in order of age 2. Check the expiration date indicated by the manufacturer and test the paint before using any that has expired 3. Stir thoroughly before use and strain through a mesh 【Free materials】 You can download a document summarizing the scope of Eiwa Kogei's powder coating services for free from the related catalog on this page.

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Since the thinner is expensive, I am diluting it a bit more conservatively. Also, have you noticed an increase in uneven skin or pinholes? 【What is happening now】 In spring 2026, major paint manufacturers raised thinner prices by more than 50% and up to 75%. Supply has stabilized, but prices remain high. 【First, please look here】 □ The surface is uneven like an orange peel 　→ The viscosity is high, and the paint is not spreading evenly □ There are more small holes 　→ The solvent has not completely evaporated from the thickly applied paint 【Countermeasures you can take starting today】 1. Measure the dilution ratio by weight and record it each time 2. Measure the time with a viscosity cup and adjust if it deviates from the standard 3. Save costs not by reducing thinner but by reviewing the amount of gun cleaning 【Free materials】 You can download a document summarizing the scope of Eiwa Kogei's baked coating services for free from the related catalog on this page.

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As autumn arrives, peeling and rust that did not appear in summer have begun to show. Isn't there a higher rate of defects in parts painted first thing in the morning? 【What is happening now】 In October, the temperature difference between morning and evening and daytime becomes significant. When cold parts from the night are brought into a warm, humid painting area, condensation occurs on the surface. 【First, please look here】 □ Only the parts painted first thing in the morning are peeling 　→ Condensation is occurring on the cold parts from the night □ Only the parts left outdoors or in the warehouse are rusting 　→ Parts after pre-treatment are cooling and absorbing moisture 【Countermeasures you can take starting today】 1. Bring the parts into the painting area early and acclimate them to room temperature 2. Paint the parts when their temperature is at least 3 degrees higher than the dew point 3. Shorten the time from pre-treatment to painting 【Free materials】 You can download a document summarizing the range of services for baked coatings from Eiwa Kogei for free from the related catalog on this page.

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Even though it's the same color clear coat, the intensity of the color varies depending on the part. This difference is more noticeable with paint that emphasizes the metallic texture. 【First, please look here】 □ Areas with thicker paint are darker in color 　→ The difference in film thickness directly translates to a difference in color. □ Even with the same film thickness, the color differs by part 　→ This is due to differences in the polishing of the base material and the color of the material. □ Only the corners and edges are lighter in color 　→ Paint does not adhere well to corners, resulting in a thinner film. 【Why does this happen?】 Color clear coat is a transparent coating with color. Since the base material is visible through it, the difference in film thickness and the base material is directly reflected. 【Countermeasures you can implement starting today】 1. Set target values and tolerances for film thickness and measure them. 2. Standardize the polishing method and material lot of the base. 3. Create three color samples with varying film thicknesses to ensure consistency. 【Free Materials】 You can download a guide summarizing how to identify and address painting troubles for free from the related catalog on this page. Eiwa Kogei offers a variety of color clear coat painting options.

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The surface of the parts taken out of the furnace is shrunk like wrinkles. It looked nice right after painting, but defects appeared after baking. 【First, please look here】 □ Only the thickly painted areas have wrinkles 　→ Too much paint was applied at once □ Fine wrinkles appear all over the part 　→ The temperature rises immediately after entering the furnace, causing the surface to harden first □ Only the areas with multiple coats have wrinkles 　→ The top coat is applied before the underlying paint film has completely dried 【Why this happens】 When the surface hardens first, the paint inside shrinks later, pulling on the surface. This force causes the surface to ripple and wrinkle. 【Countermeasures you can implement starting today】 1. Control the thickness of each coat and apply thin layers 2. Allow a setting time after painting before placing it in the furnace 3. For multiple coats, establish and adhere to the drying time of the underlying paint film 【Free Materials】 You can download a guide summarizing how to identify and address painting troubles for free from the related catalog on this page. Eiwa Kogei adjusts conditions for painting from test coatings to mass production using three types of equipment.

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When the tape was removed during the grid test, the paint film came off with it. There are hints about the cause in the way it peeled off. 【First, please look here】 □ The base metal is visible as is 　→ This indicates poor adhesion with the material. Suspect degreasing or chemical treatment issues. □ Only the primer remains, and the topcoat has come off 　→ This indicates poor adhesion between layers. Suspect the interval between coatings. □ The corners of the squares are chipping and cracking finely 　→ This is due to overbaking, making the paint film brittle. 【Why distinguish these issues】 Whether the peeled surface is the base or between paint layers changes the process that needs to be corrected. Changing the paint without examining the peeled surface will not improve adhesion. 【Countermeasures you can implement starting today】 1. Take a photo of the peeled surface and record which layer it came off from. 2. If it's the base, review the pretreatment; if it's between layers, reconsider the drying time. 3. If overbaking is the issue, compare the furnace temperature and time with your records. 【Free materials】 You can download a guide summarizing how to distinguish and address painting troubles for free from the related catalog on this page. Eiwa Kogei offers services from zinc phosphate chemical coating to baking paint.

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Even though they were baked in the same furnace, only the thick parts have a sticky surface. The furnace thermometer shows the usual numbers. 【First, please look here】 □ Only the thick parts and castings are sticky 　→ The baking time has ended before the parts have fully warmed up □ Only the back side or the inside of the parts are sticky 　→ They are not exposed to hot air and the temperature has not risen □ Only the parts close to the entrance of the furnace are sticky 　→ There are temperature variations in different locations within the furnace 【Why does this happen】 The curing of the paint is determined by the surface temperature of the parts, not the temperature of the furnace. Thick parts take longer to warm up because they retain heat. 【Countermeasures you can take starting today】 1. Attach temperature recorders to the parts to measure the actual temperature 2. For thick parts, extend the baking time or bake them in a separate batch 3. Record the temperature for each location within the furnace 【Free materials】 You can download a guide summarizing how to identify and address painting troubles for free from the related catalog on this page. Eiwa Kogei handles baking paint for all types of metals, including iron, aluminum, and zinc die casting.

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The metallic paint shows a striped pattern depending on how the light hits it. Although it is not noticeable from the front, it becomes a prominent defect when viewed from an angle. 【First, please look here】 □ The stripes align with the direction of the spray gun's movement 　→ The overlap of the spray is insufficient □ The edges of the parts are darker in color 　→ The spray distance is too far, causing dry particles to settle □ The brightness varies from part to part 　→ The speed of the spray gun differs depending on the painter 【Why does this happen?】 The metallic shine is produced when aluminum particles in the paint film are aligned flat. If the application method is inconsistent, the orientation of the aluminum particles changes from place to place, resulting in a striped appearance. 【Countermeasures that can be implemented starting today】 1. Set the overlap width to more than half and ensure everyone is consistent 2. Confirm the spray distance and gun speed using a test spray board 3. Conduct inspections from both the front and at an angle 【Free Materials】 You can download a guide summarizing how to identify and address painting troubles for free from the related catalog on this page. Eiwa Kogei can proceed to mass production after confirming the finish with testing equipment.

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A small hole has appeared on the painted surface. Upon closer inspection, isn't there a round dent mixed in instead of a hole? 【First, please look here】 □ A thin hole that looks like it was poked with a needle, with the base showing the substrate 　→ Pinhole. Caused by gas or moisture within the material. □ A round dent with a raised edge and a thin center 　→ Blister. Oil or silicone is present on the paint surface. □ Only the area around the hole has a different gloss 　→ This is a mark left by foreign substances or debris that have burned off. 【Why distinguishing them is important】 Pinhole issues are related to the material and drying, while blisters are related to oil content. Since the causes are different, taking measures without distinguishing them will not yield effective results. 【Measures you can take starting today】 1. If it's a pinhole, review the pre-baking and water drainage drying processes. 2. If it's a blister, check for degreasing and inspect for oil or spray substances in the workspace. 3. Record the occurrence location on a diagram and see if it appears in the same spot on the parts. 【Free materials】 You can download a guide summarizing how to distinguish and address painting troubles for free from the related catalog on this page. Eiwa Kogei handles everything from pre-treatment like chemical film processing to baked painting.

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Even after repainting, the same area swells up again. Please cut open the swelling once and take a look inside. 【First, please look here】 □ The inside is damp and water is coming out 　→ Moisture and salt from the pre-treatment remain □ The inside is brown and rusty 　→ Rust from before painting or rust spreading from scratches in the substrate □ The inside is dry and only hollow 　→ Gases or solvents inside the material have not fully escaped 【Why does it keep happening?】 Simply repainting from the top leaves the cause of the swelling still underneath the paint film. If you take measures without checking the contents, it won't stop even if you change the paint. 【Countermeasures you can take starting today】 1. Break three swollen parts and record the contents 2. If it's water, wash and dry; if it's rust, remove the rust; if it's hollow, review the drying process 3. Compare the number of swellings in three batches after the countermeasures 【Free materials】 You can download a guide summarizing how to identify and address painting troubles for free from the related catalog on this page. Eiwa Kogei handles everything from paint stripping to pre-treatment and repainting.

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The painted surface is uneven like an orange peel, and light does not reflect off it. In exterior parts, this orange peel texture alone can lead to rejection. ────────────── ■ Cause of Occurrence Orange peel occurs when the paint begins to dry before it spreads out evenly. The main causes are too high viscosity, too far a spraying distance, and low air pressure resulting in coarse mist. ■ Truth When thinner is saved and viscosity is increased, orange peel increases significantly. On hot days, drying occurs quickly, making it easier for unevenness to appear even under the same conditions. ■ Improvement Measures Viscosity should be measured with a viscosity cup, and a standard number of seconds should be established for each season. The spraying distance and air pressure should be standardized for each painter, and the condition of the surface should be checked with a test panel. Allow for a setup time before entering the oven to ensure the paint has time to spread evenly. Eiwa Kogei supports baked painting of exterior parts from small lots to mass production. Please download the materials summarizing the confirmation points in the process for your use.

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While it doesn't matter with white, only the black paint gets disqualified due to blemishes. This defect is more likely to occur with dark colors or high-gloss finishes. ────────────── ■ Cause of Occurrence Blemishes are caused by dust, fibers, or paint residues getting into the paint film. Black or high-gloss surfaces reflect light strongly, making even small foreign objects stand out. ■ Truth Most foreign objects are brought in from outside the painting area. The main entry routes are fibers from work clothes, old paint films attached to hanging fixtures, and clogged mesh from paint strainers. If the airflow in the booth is weak, dust that has settled will fall directly onto the painted surface. ■ Improvement Measures Before painting, blow off the parts with air, and regularly strip and clean the hanging fixtures. Use paint only after passing it through a strainer, and manage the booth's filters according to replacement standards. For black or high-gloss finishes, it is reassuring to have a sample of the acceptable limits for blemishes. Eiwa Kogei can also assist with painting parts that have strict appearance requirements, such as black or high-gloss finishes. Please download the materials summarizing the key points for process verification and utilize them.

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The shipping inspection passed, but a few days later, the paint film started to swell. If found in the customer's warehouse, it will become an issue for the entire lot. ────────────── ■Cause of Occurrence If the pre-treatment rinsing is insufficient, the salt from the chemicals remains on the surface of the material. When painted over, moisture that passes through the paint film is attracted to the salt. ■Truth Water gathers around the salt, pushing the paint film up from the inside. This results in blister-like swelling. Since it is not noticeable immediately after painting, it cannot be detected during the shipping inspection. ■Improvement Measures Since the final rinsing water is prone to contamination, we will measure and manage its conductivity daily. We will set numerical standards for water replacement and keep records. After rinsing, we will immediately drain and dry to ensure no moisture remains on the surface of the material. Eiwa Kogei handles everything from zinc phosphate chemical coating to baked painting. Please download and utilize the materials summarizing the confirmation points of the process.

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The countermeasure document has arrived. Yet, the same defects are mixed in the following month. ────────────── ■Cause of Occurrence Most of the countermeasure documents end with "work carefully" and "strengthen inspections." This means that once the person in charge changes, it will revert to the original state. ■Truth The recurring defects are caused by the fact that the conditions of the process are not defined by numbers. The temperature of the degreasing solution, the viscosity of the paint, the film thickness, and the temperature and time of curing. If there is no record of even one of these, we cannot trace back to understand why the defect occurred. ■Improvement Measures When requesting corrections, we will confirm which numbers were changed in which process. Both parties will have a sample of the acceptable limits for defects and align the criteria for pass or fail. We will receive records for three lots after the changes and confirm the effectiveness before concluding. Eiwa Kogei has processes from chemical film treatment to curing and can consult on separating causes. Please download the materials summarizing the confirmation points of the process for your use.

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• Casting Machine

Even though I repainted the peeled areas, they peel off again after a while. Is that part just painted over the old layer? ────────────── ■ Cause of Occurrence The old paint film around the peeled area may appear intact, but its adhesion is weak. Underneath, rust spreads and lifts the new paint film. ■ Truth Even if you paint over it, it is only sitting on the weakened old paint film and rust. If the compatibility between the old paint film and the new paint is poor, shrinkage or lifting may occur immediately after application. ■ Improvement Measures The basic approach for repainting is to completely remove the old paint film and rust. After stripping, check the substrate and start over with degreasing and chemical treatment. Parts that are non-conforming or need a color change can also be painted using the same process as new ones after stripping. Eiwa Kogei handles everything from paint film removal through heat treatment and blasting to repainting. Please download and utilize the materials summarizing the key points for process verification.

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Only the items painted on rainy days lack luster and appear whitish. Defects increase during the long rainy season in autumn. ────────────── ■Cause of Occurrence When the thinner in the paint evaporates, it draws heat from the painted surface, causing the temperature to drop. When humidity is high, moisture in the air condenses on the cooled painted surface and is absorbed into the paint film. This results in a white cloudy appearance known as "clouding." ■Truth The cause is that the same thinner and conditions are used as on sunny days. If parts enter the painting area while still cold, it becomes even more likely to occur. ■Improvement Measures It is generally advisable to refrain from painting when humidity is above 85 percent. Switch to a slower-evaporating thinner to prevent rapid cooling of the painted surface. Keep the temperature of the parts at least 3 degrees higher than the dew point, and record humidity and temperature daily. Eiwa Kogei offers baking paint, powder coating, and air-drying paint services. Please download the materials summarizing the key points for process verification and make use of them.

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Is it acceptable to ask the same contractor as before to conduct measurements at the painting facility? This confirmation will be necessary starting in October. On October 1, 2026, amendments to the Organic Solvent Poisoning Prevention Regulations and others will be enforced. ────────────── ■Cause of Occurrence In painting facilities, organic solvents such as thinners are used, making it mandatory to manage the working environment. The recent amendments have established requirements for those conducting personal exposure measurements. ■Truth At each stage of measurement design, sample collection, and analysis, it is necessary for individuals to meet requirements such as completing training. This applies not only to the Organic Solvent Regulations but also to the Special Regulations, Lead Regulations, and Dust Regulations. ■Improvement Measures First, confirm how measurements are conducted within your company. Also, verify by October whether the contracted measurement company meets the requirements. Reviewing the amount of paint used and ventilation will also be effective if done concurrently. Eiwa Kogei, as a specialized factory for metal baking paint, is available for painting consultations. Please download and utilize the materials summarizing the key points for process confirmation.

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The thinner prices have risen significantly, so we switched to water-based paint. However, peeling that had never occurred before has started to appear. In spring 2026, major paint manufacturers raised thinner prices by more than 50% and up to 75%. ────────────── ■ Cause of Occurrence Water-based paints are weaker than solvent-based paints in their ability to dissolve oils on the surface of materials. The lack of degreasing that could be compensated for by solvent-based paints directly leads to poor adhesion. ■ The Truth The problem is not with the paint itself, but with not reviewing the pre-treatment during the switch. Water-based paints are also more susceptible to humidity during drying, and may not fully dry under the same furnace conditions. ■ Improvement Measures During the switch, we will recheck the degreasing conditions and water drainage drying. We will conduct adhesion tests on trial paint boards and redefine the curing conditions before entering mass production. Eiwa Kogei can proceed to mass production after confirming the conditions with testing equipment. Please download and utilize the materials summarizing the confirmation points in the process.

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Right after application, it looks beautiful, but when taken out of the furnace, there are small holes lined up. This defect does not stop even when the paint is changed. ────────────── ■ Cause of Occurrence Inside castings and die casts, there are invisible cavities. The air or moisture trapped there expands with the heat of curing and breaks through the paint film. ■ Truth The holes open from the material side, not the surface of the paint film. If water from the pretreatment enters the cavities and is painted over before it dries completely, it will increase further. Even if the film thickness is increased to hide it, it will reoccur with each curing. ■ Improvement Measures Before painting, pre-bake the material at a temperature higher than the curing temperature to remove the gas first. It is also important to extend the drying time after washing to ensure no moisture remains in the cavities. Eiwa Kogei supports painting for all metals, including iron, aluminum, and zinc die casts. Please download the materials summarizing the confirmation points of the process for your use.

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Are there any drips left on the painted parts? Even if you sand and fix it, that area will have a different gloss and film thickness. ────────────── ■Cause of Occurrence Drips occur when too much paint is applied at once. This can also happen if the viscosity is too low, the spraying distance is too close, or the gun movement is too slow. ■Truth Around holes and on downward edges are places where paint tends to accumulate. When placed in the oven and the temperature rises, the paint softens and flows further. This is why drips can appear after curing, even if there were none immediately after painting. ■Improvement Measures Measure the viscosity with a viscosity cup each time and record the seconds. Keep the thickness of each coat thin and allow for a setting time before placing it in the oven. Eiwa Kogei supports everything from trial painting to mass production with three systems of equipment. Please download the materials summarizing the confirmation points of the process and make use of them.

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As soon as I specified the color number, I was told the delivery time would be two weeks. The delivery time varies significantly depending on the availability of stock. ────────────── ■Cause of Occurrence Paint is primarily produced to order for each color, and there is only a very small amount of stock available at all times. Specified colors take time from order to arrival. ■Truth Since the supply disruption in spring 2026, the arrival dates are unpredictable for certain brands. For small quantities of specified colors, minimum lot constraints lead to surplus stock. Additionally, the increase in color change setups makes it disadvantageous in terms of production capacity. ■Improvement Measures For areas that do not affect appearance, we will align with stock colors or standard colors. Before deciding on a color, we will confirm the procurement status of candidate colors with the painting company. Eiwa Kogei is responding with alternative proposals using stock colors and pre-confirming delivery times.

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The client has requested the ingredient list of the paint being used. The scope of what is required has expanded due to legal revisions. ────────────── ■Cause of Occurrence From April 2026, the number of substances subject to mandatory labeling and SDS provision has significantly increased. Approximately 850 substances have been added to the roughly 1600 substances from the previous year. ■Truth Paint is a mixture of resins, pigments, and solvents, and may contain subject substances. The issuance of the ingredient list is the responsibility of the paint manufacturer, not the painting company. If requested just before shipment, it can cause delays due to the time required to obtain it. ■Improvement Measures At the estimation stage, we will communicate the necessity of ingredient investigation and submission deadlines in advance. Once the brand to be used is decided, we will arrange to obtain the documents. Eiwa Kogei is prepared to provide ingredient information for the paints used.

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When I specified the same paint as before, I was told it was no longer being produced. The number of brands is decreasing. ────────────── ■Cause of Occurrence Since the supply disruption in spring 2026, paint manufacturers have been narrowing down the varieties they produce. Brands that are not bestsellers are being consolidated or discontinued, and a switch to successor products is being requested. ■Truth Even if the successor product has the same color number, the resin and pigment formulations have changed. Due to differences in gloss and hiding power, if applied directly, there will be a color difference compared to the old product. Some brands have extended their delivery time from the usual 1-2 days to 1-2 weeks. ■Improvement Measures For the approved drawings, we will specify the color number and standards instead of the brand name. During the transition, we will confirm color differences and adhesion using test paint boards before entering mass production. Eiwa Kogei is responding to the selection of alternative brands and the submission of test paint boards.

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Here, it's a pass; at the client, it's a fail. The reason for the differing judgments is that the criteria are based solely on words. ────────────── ■Cause of Occurrence The pass/fail judgment of appearance changes depending on the viewing distance, angle, and lighting. Writing "no scratches" without setting conditions will not yield consistent judgments. ■Truth When light is shone from an angle, unevenness that is not visible from the front becomes apparent. Just a 30-centimeter difference in inspection distance can change the size of defects that can be detected. Without a standard sample, the criteria shift every time the person in charge changes. ■Improvement Measures Set numerical values for inspection distance, illumination, and viewing angle, and share physical standard samples. Keeping both pass and fail products as samples stabilizes the judgment. Eiwa Kogei is responding to the establishment of inspection conditions based on standard samples.

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The color approved during the prototype has changed in mass production. Even though the paint is the same, the conditions have not been carried over. ────────────── ■ Cause of Occurrence The application method changes from hand spraying in the prototype to automatic in mass production. If the application method changes, the film thickness changes, and if the film thickness changes, the color also changes. ■ Truth In the prototype, the paint is applied carefully over a longer period, resulting in a thicker film. In mass production, the speed increases, and even with the same settings, it becomes a few microns thinner. Light colors and metallics can change in appearance with this few microns. ■ Improvement Measures Record the film thickness and curing conditions numerically during the prototype phase and pass them directly to mass production. Choosing a company that can perform both prototypes and mass production on the same equipment prevents discrepancies. Eiwa Kogei handles everything from a single prototype to mass production on the same line.

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