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Color migration in paint coatings

2026-02-13View Original

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Color migration is a common problem in coating applications; it refers to the migration of colored substances from the lower layer (substrate or primer) into the upper layer (topcoat), resulting in discoloration, powdering, yellowing, or irregular color spots in the topcoat. This phenomenon is common in wood, metal, flooring, and industrial anti-corrosion coatings. Although it usually does not affect the anti-corrosion properties, it severely damages the appearance and affects customer acceptance.

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