What are the causes of color mismatch? Three basics of color difference management in painting.
The color does not match the previous lot and adjacent parts. The cause is the film thickness and baking temperature. I will explain a method to manage this with numerical values instead of visual inspection.
Even though they have the same color number, they look different when placed next to the previous lot. It is not the paint, but the film thickness and curing conditions that affect the color. If the film thickness changes by 10 microns, the color difference becomes noticeable to the naked eye. ────────────── ■Cause of Occurrence Colors with low hiding power will show a change in brightness when the film thickness is thin, as the substrate becomes visible. The higher the curing temperature, the more the resin yellowes, and the difference is more pronounced in white shades. ■Truth Color matching done only by visual inspection creates variability among evaluators. When the type of lighting changes, the same painted panel can appear to have a different color. ■Improvement Measures Measure with a color difference meter and set the acceptance criteria numerically. Keep the film thickness within specified ranges and fix the curing temperature and time for each color. Please utilize the materials that summarize color management and film thickness standards.
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Material compatibility: Iron / Stainless steel / Aluminum / Aluminum die casting / Zinc die casting / Color management: Color difference measurement and allowable value operation using standard color plates / Supported colors: 30 colors (custom color matching available) / Monthly production: 300,000 units, 100 types / ISO 9001 certification obtained.
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Products that combine multiple parts such as home appliance exteriors, OA equipment housings, automotive parts, fixtures, and building materials. Supports color matching of adjacent parts.
Company information
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.
