White discoloration that occurs frequently during the rainy season and summer. It is a phenomenon where the paint surface cools and condenses due to the evaporation of the solvent. It can be prevented by selecting the right thinner and managing humidity.
Only black and clear finish strangely turns out cloudy white. Before suspecting the paint lot, please check the humidity for that day. When humidity exceeds 70 percent, the risk of whitening rises sharply. ────────────── ■Cause of Occurrence When the solvent evaporates, the temperature of the paint surface drops, causing moisture in the air to condense. The tiny water droplets that are taken in scatter light and make the surface appear cloudy white. ■Truth Fast-drying thinners cause a greater drop in temperature during evaporation, leading to whitening. Managing humidity and the temperature of the material is more effective than managing temperature alone. ■Improvement Measures On days with high humidity, use 5-10 percent slow-drying thinner or retarders in combination. Keep the humidity in the painting booth below 60 percent and acclimate the materials to room temperature. Please utilize the materials summarizing the thinner selection criteria by season.
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Corresponding materials: Iron / Stainless steel / Aluminum / Aluminum die casting / Zinc die casting / Brass / Humidity control: Painting booth below 60 percent / Thinner: Fast-drying and slow-drying used according to temperature and humidity ranges / Monthly production of 300,000 units, 100 types, 30 colors / ISO 9001 certification obtained.
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Black and clear coating for home appliance exteriors, OA equipment housings, automotive parts, fixtures, sign materials, etc. Also compatible with color clear coating.
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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.
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