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Discoloration prevention agent Product List and Ranking from 6 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.

Discoloration prevention agent Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.

  1. ＡＳＡＨＩ Osaka//Chemical
  2. Daiwa Fine Chemicals Co., Ltd. Hyogo//Other manufacturing
  3. 千代田ケミカル Yamaguchi//Chemical
  4. 4 keg Kyoto//Industrial Machinery
  5. 5 シミズ Osaka//Manufacturing and processing contract
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Discoloration prevention agent Product ranking

Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.

  1. Silver tarnish inhibitor AC-20 (sulfur-based rust inhibitor) ＡＳＡＨＩ
  2. Copper discoloration prevention agent "BT-8" (hydrophilic) ＡＳＡＨＩ
  3. Copper discoloration prevention agent "BT-5" 4ℓ (hydrophobic) ＡＳＡＨＩ
  4. 4 Nickel plating discoloration inhibitor 千代田ケミカル
  5. 5 Water-soluble discoloration inhibitor for copper and copper alloys 'VERZONE TT-250A' Daiwa Fine Chemicals Co., Ltd.

Discoloration prevention agent Product List

1～15 item / All 28 items

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Color change inhibitor Chrome-free ACR

Color change inhibitor Chrome-free ACR

It is a discoloration preventive agent for trivalent chromium plating and tin-based alloy plating.

Decorative plating, particularly tin-based alloy plating and trivalent chromium plating, has widely utilized hexavalent chromium electroplating as a post-treatment to improve corrosion resistance. However, due to environmental considerations, there has been a growing demand for alternative treatments to electroplating. Chromium-free ACR is a corrosion protection agent that does not use hexavalent chromium at all. For more details, please contact us.

  • paint

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Water-soluble discoloration inhibitor for copper and copper alloys 'VERZONE TT-250A'

Water-soluble discoloration inhibitor for copper and copper alloys 'VERZONE TT-250A'

Even when used with circulating water, it has excellent discoloration prevention effects! It exhibits remarkable rust prevention effects even in a strongly alkaline environment.

The "VERZONE TT-250A" is a discoloration prevention agent for copper and non-ferrous metals. It contains benzotriazole derivatives as the discoloration prevention component. This product is liquidized using a special method for benzotriazole derivatives, eliminating the need for dusting during addition and the process of confirming dissolution, making it easier to handle. 【Features】 ■ Being in liquid form, there is no dusting during addition, and the process of confirming dissolution is unnecessary. ■ It exhibits significant rust prevention effects even in strongly alkaline environments. ■ Excellent discoloration prevention effects can be achieved even when used in circulating water. ■ It contains benzotriazole derivatives as the discoloration prevention component. *For more details, please refer to the PDF document or feel free to contact us.

  • Rust Inhibitor

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Heat-resistant silver tarnish prevention New Dain Silver TN

Heat-resistant silver tarnish prevention New Dain Silver TN

It suppresses discoloration of silver due to heating and reduces the decrease in reflectivity and luster!

* It is a water-soluble type of heat-resistant silver discoloration preventive agent. * Acidic type with a pH of 1 to 2.5. * It acts on silver and silver-plated surfaces to suppress discoloration caused by silver sulfide. * It suppresses discoloration of silver and reduction of reflectivity due to heating. * It forms a heat-resistant film that continues to suppress discoloration from silver sulfide even after heating. * It does not affect the contact electrical resistance of silver.

  • Chemicals

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[New Product] Heat-Resistant Copper Discoloration Preventive Agent VERZONE HC-1

[New Product] Heat-Resistant Copper Discoloration Preventive Agent VERZONE HC-1

It suppresses the discoloration of heated copper and improves moisture resistance. It is a water-soluble, non-chrome, environmentally friendly product.

【Discoloration Prevention Performance】 ■ Suppresses discoloration when copper materials are heated (140–200°C). ■ Suppresses discoloration at high temperatures and high humidity (>70°C, >80%RH). 【Other Features】 ■ A water-soluble, non-chrome, environmentally friendly product that contains no inorganic components. ■ Does not adversely affect the contact resistance of copper surfaces. 【Examples of Use】 ■ Copper-plated products, copper foil, copper wire. ■ Rolled copper foil, electrolytic copper foil (for printed circuit boards, lithium-ion battery anodes, etc.). ■ Alternative to chrome treatment for copper foil. ■ Suppresses discoloration during heating in post-processes such as reflow and soldering. ■ Further enhances discoloration prevention effects during heating by post-treating chromate coatings.

  • Printed Circuit Board
  • Non-ferrous metals

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Non-chrome heat-resistant copper discoloration inhibitor VERZONE HC series

Non-chrome heat-resistant copper discoloration inhibitor VERZONE HC series

Environmentally friendly, heat-resistant water-soluble copper discoloration inhibitor.

【Discoloration Prevention Performance】 ■ Suppresses discoloration when copper materials are heated (140–200℃). ■ Suppresses discoloration at high temperatures and high humidity (>70℃, >80%RH). 【Other Features】 ■ A water-soluble, non-chrome product that contains no inorganic components, making it environmentally friendly. ■ Does not significantly adversely affect the contact resistance of copper surfaces. 【Examples of Use】 ■ Copper-plated products, copper foil, copper wire. ■ Rolled copper foil, electrolytic copper foil (for printed circuit boards, lithium-ion battery anodes, etc.). ■ Alternative to chromium treatment for copper foil. ■ Suppresses discoloration during heating in post-processes such as reflow and soldering.

  • Non-ferrous metals
  • Printed Circuit Board

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Copper discoloration preventive agent "BT-14" (hydrophobic)

Copper discoloration preventive agent "BT-14" (hydrophobic)

"Heat-resistant copper discoloration inhibitor" prevents self-oxidation of copper due to high temperatures. It is a water-soluble copper discoloration inhibitor that further enhances the heat resistance of BT-8.

We previously commercialized BT-8 as a heat-resistant discoloration inhibitor, but in response to the demands of our customers, we have developed BT-14, which has further improved heat resistance and the following features. The heat resistance is enhanced compared to BT-8, and it can be used at an acidic pH of 2 to 3. 【Features】 ■ Organic substances form complexes with copper, protecting the copper surface from oxidation. ■ Since preventing discoloration of copper often requires high-temperature heat resistance, we offer a heat-resistant discoloration inhibitor suitable for high temperatures. ■ The concentrate can be diluted from 20 times to 10 times for use, making it cost-effective. ■ Treatment at room temperature is also possible. For optimal performance in a short time, we recommend a treatment temperature of 50 to 60°C.

  • Other consumables

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Copper discoloration prevention agent "BT-8" (hydrophilic)

Copper discoloration prevention agent "BT-8" (hydrophilic)

Are you troubled by the discoloration of copper? ASAHI's BT series protects copper from discoloration due to oxidation.

This is a water-soluble copper discoloration preventer that forms a complex of copper and organic substances on the copper surface, preventing oxidation and long-term discoloration. It has the characteristic that a coating treatment can be obtained simply by immersion. ■ BT-8 forms a heat-resistant copper discoloration protective film (oxidation prevention film). ■ The heat resistance time varies with temperature (e.g., 180°C for 20 minutes). ■ The surface treated with this agent does not experience a decrease in electrical resistance. ■ BT-8 has high hydrophilicity, resulting in good adhesion with water-based paints and reducing the defect occurrence rate. 【Specifications】 ■ Appearance: Colorless to pale yellow transparent liquid ■ Specific gravity: 1.0 ■ pH: Neutral

  • Non-ferrous metals

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Silver tarnish inhibitor AC-70 (sulfur-based rust preventive agent)

Silver tarnish inhibitor AC-70 (sulfur-based rust preventive agent)

A protective film is formed on the silver surface, which maintains the luster of the silver for a long time. The protective film has good solderability and a low electrical contact resistance.

AC-70 is designed to maintain resistance to sulfur gas like AC-20 and to form a thin, uniform protective film. Due to the thin and uniform protective film, there is no unevenness in the thickness of the protective film even when applied to glossy silver and semi-gloss silver plating. It is a silver discoloration preventive agent used to protect the surfaces of electrical and electronic components, as well as jewelry and utensils, from various harmful atmospheres. The environments that affect silver and silver-plated surfaces are diverse, but particularly when exposed to atmospheres containing sulfur gas, sulfides are generated on the silver surface, causing the appearance of the silver surface to turn black, increasing electrical resistance in electronic components, and reducing conductivity. The silver discoloration preventive agent AC-70 forms a strong film on the silver surface, protecting it from sulfide and oxidation. Additionally, the protective film has good solderability and low electrical contact resistance. Being water-based and neutral, it is also easy to treat wastewater. Like AC-20, AC-70 provides a high discoloration prevention effect against sulfur gas within the AC series.

  • Other metal materials
  • LED Module
  • Other Connectors

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Silver tarnish inhibitor AC-10A

Silver tarnish inhibitor AC-10A

A protective film is formed on the silver surface, which maintains the luster of the silver for a long time. The protective film has good solderability and low electrical contact resistance.

This is a silver discoloration preventive agent designed to protect the surfaces of electrical and electronic components, as well as jewelry and utensils made of silver or silver-plated materials, from various harmful environments. The environments that affect silver and silver-plated surfaces are diverse, but particularly when exposed to atmospheres containing sulfur gas, sulfides form on the silver surface, causing it to discolor to a black color. In electronic components, this leads to an increase in electrical resistance and a decrease in conductivity. The silver discoloration preventive agent AC10A forms a strong film on the silver surface, protecting it from sulfide and oxidation. Additionally, the protective film has good solderability and low electrical contact resistance. AC-10A is a water-based solvent type silver discoloration preventive agent that is widely used in electrical and electronic components such as switch contacts that dislike water, connector contact points, and printed circuit boards.

  • Other metal materials
  • LED Module
  • Other Connectors

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Solid wire, discoloration preventive agent for wire drawing

Solid wire, discoloration preventive agent for wire drawing

It can be used for preventing discoloration after annealing of wires and for providing lubricity to the wires during carrier removal.

We would like to introduce Chiyoda Chemical Co., Ltd.'s "Solid Wire and Wire Drawing Discoloration Preventive Agent." There is a process of winding solid wires, including copper-plated ones, after wire drawing. Previous discoloration preventive agents had issues such as "excellent lubrication but discoloration of copper" and "prevention of copper discoloration but poor lubrication, resulting in reduced carrier load capacity." Our product contains components that provide lubrication to the wire, increasing load capacity and eliminating discoloration issues after wire drawing and copper plating. 【Features】 ■ No discoloration during copper wire storage ■ Contains lubrication ■ No occurrence of white spots after discoloration preventive treatment *For more details, please refer to the PDF document or feel free to contact us.

  • others

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Nickel plating discoloration inhibitor

Nickel plating discoloration inhibitor

Exhibits high discoloration prevention effects against electroplated and non-electroplated nickel plating! Maintains a clean surface condition.

We would like to introduce the "Discoloration Preventive Agent for Nickel Plating" handled by Chiyoda Chemical Co., Ltd. This product suppresses liquid cloudiness and the occurrence of precipitation, thereby reducing dirt on the plating surface and in the treatment tank. Additionally, it can prevent rust from forming on the iron substrate in pinhole areas. There is no occurrence of water stains due to condensation. 【Features】 ■ Exhibits high discoloration prevention effects for both electrolytic and non-electrolytic nickel plating ■ Maintains a clean surface condition, making it difficult for fine dust and other particles to adhere ■ Capable of suppressing dirt on the plating surface and in the treatment tank ■ Can prevent rust formation on the iron substrate in pinhole areas ■ No occurrence of water stains due to condensation *For more details, please refer to the PDF document or feel free to contact us.

  • others

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Copper plating discoloration prevention agent

Copper plating discoloration prevention agent

Copper-plated parts, to prevent discoloration after plating! The water repellency does not decrease even if the plating solution is mixed in.

Introducing the "Discoloration Preventive Agent for Copper Plating" handled by Chiyoda Chemical Co., Ltd. During the water washing process after discoloration prevention treatment, when lifting the plated sheets and parts, if the water does not flow down smoothly, it will adhere to the plated sheets and parts, causing stains. Conventional products have water-repellent properties when new, but after prolonged use, the plating solution mixes with the discoloration preventive liquid, reducing water repellency and causing stains. Our product maintains its water-repellent properties even when mixed with the plating solution. 【Product Details】 ■ Solubility: (soluble) water, alcohol, glycol ■ Appearance: colorless to yellow liquid ■ Packaging: (can) 22kg (drum) 240kg *For more details, please refer to the PDF document or feel free to contact us.

  • others

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Okuno Pharmaceutical Industry's metal rust prevention and discoloration prevention agent.

Okuno Pharmaceutical Industry's metal rust prevention and discoloration prevention agent.

A rust prevention and discoloration prevention agent that is very popular among surface treatment professionals! Which product should you choose? We recommend the best products based on the material and purpose!

Rust appeared on the metal material after plating. Discoloration occurred on the product after surface treatment. We are looking for a discoloration prevention agent to use between work processes. We are searching for the optimal primary rust prevention agent during the storage and transportation of plated products... Do you have such concerns? Okuno Pharmaceutical Industry recommends the best products according to the material and purpose. Please feel free to consult with us first. Okuno Pharmaceutical Industry's rust prevention agents and discoloration prevention agents ~What's amazing about them!~ We propose the optimal products based on the type of base metal and plating film. Significantly reduces work time with a simple process. Does not affect the physical properties of the base material. A wide variety of options available. Environmentally friendly products are also in the lineup. We will propose products that perfectly match your needs. Additionally, we can introduce processing locations, so please feel free to ask us anything.

  • Chemicals

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Silver Plating Discoloration Preventive Agent New Dain Silver S-1

Silver Plating Discoloration Preventive Agent New Dain Silver S-1

Protects silver-plated surfaces from discoloration due to sulfide, oxidation, and other factors.

■ It exhibits strong effects in preventing discoloration of various silver-plated products. ■ It is ideal for surface treatment of electronic components and decorative items. ■ It does not affect the contact resistance or solder wettability of metal surfaces. ■ It forms a water-repellent film without stains or stickiness after treatment. ■ It does not contain heavy metals like chromium or organic solvents, and is not subject to the Poisonous and Deleterious Substances Control Law, the Industrial Safety and Health Law, the Fire Service Law, or the PRTR Law. ■ It is equivalent to thiol treatment.

  • nds-s1 test.jpg
  • Chemicals

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Discoloration Preventive Agent for Zinc Plating - VERZONE DA-3

Discoloration Preventive Agent for Zinc Plating - VERZONE DA-3

Suppress discoloration of tin plating with the formation of a water-repellent film! It is an acidic, immersion-type tin plating discoloration prevention agent.

"VERZONE DA-3" is a discoloration prevention agent for tin plating that exhibits a powerful discoloration prevention effect. This treatment solution is acidic and can be used with a simple immersion treatment. In constant temperature and humidity tests (85°C/85% RH), there is no discoloration after 120 hours, and there is almost no change in solder wettability before and after the discoloration prevention treatment. 【Example of Treatment Process】 ■ Tin and tin alloy plating ■ Rinsing ■ Discoloration prevention ■ Rinsing ■ Drying *For more details, please refer to the PDF document or feel free to contact us.

  • Plating Equipment

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