What is the cause of the increase in defects when reducing thinner? Management of dilution ratio.
Since the price increase of thinner in spring 2026, prices have remained high. This explains the defects that arise from saving on thinner and how to maintain the dilution ratio.
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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Theme: High Prices of Thinner (2026). Management Items: Dilution Ratio, Paint Viscosity, Thinner Usage for Gun Cleaning. Target Defects: Orange Peel, Pinholes.
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Baked paint for metal parts using solvent-based paint. Material cost management by the purchasing department, standardization of dilution conditions by the quality control department, and training materials for new employees.
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We are not just a "subcontracted painting factory." Established in 1958, our company has a foundation of painting technology and also specializes in chemical treatment, stripping, and cleaning, functioning as the "external surface treatment department" in your organizational chart. Based on our philosophy of "preparation is eight-tenths of the work," we emphasize participation from the "upstream process" before the drawings are finalized. We conduct test painting on a wide range of metals and difficult materials, and we produce the entire process from assembly, packaging, to delivery, thereby reducing your management workload. Additionally, by being able to perform zinc phosphate treatment in-house, we achieve stable painting quality. Furthermore, our micro-heating stripping technology, which does not use chemicals, maintains the electrical state of the "jigs (hangers)" that influence painting quality. Our approach of "pre-treatment determines painting quality" ensures the stability of the paint film during mass production. Rather than simply "applying specified standards," we work backwards to achieve optimal painting specifications and prevent scratches during transportation, sparing no effort in thorough discussions from the outset. This diligent preparation is the shortest path to preventing rework and minimizing total costs. From the development stage, please utilize the expertise of our specialists as part of your production line.
