Before color matching of PU color paste, the tonal range of color matching (standard color card, swatch or paint sample) should be understood in combination with the process. Choose 1~2 main color pastes according to the color paste we are familiar with. Some colors may simply be a single color paste. Then select a secondary (secondary) colorant for fine-tuning the tone. If you cannot judge the auxiliary color paste at first, you can refer to the standard color selection during the adjustment of the main color paste. Color paste color matching should follow the principle of first priority and second priority, from light to dark. When toning, the main color paste should be added first. The main color paste is a color paste with a large weight ratio. The proportion of auxiliary color paste is small, but the influence of auxiliary color paste is greater. Reduce each feed by estimate, especially close to the specified chromaticity, to avoid excess. After basically conforming to the standard color, slowly adjust from light to dark according to the proportion of color paste. When the color is a little lighter than the standard color, determine the color difference, and finally make fine adjustments on this basis. Difficulty of color matching: Difficulty of color matching: Adjust the brightness from high to low, and adjust the color from light to dark, otherwise it will be difficult. Generally speaking, the color adjustment operation is a careful process, and it is good to sum up experience and improve the color adjustment speed. It is of great significance to keep the samples and record the data after calibration, which is of great significance to ensure the quality and improve the color matching efficiency.
