Selection of dyes:
There are more than ten types of commonly used dyes. How to choose the appropriate dye when dyeing is the key to the success or failure of dyeing. When choosing dyes, in addition to In addition to factors such as the type of dyed fibers, the use of the dyed objects, color requirements, price and cost, supply, quality, dyeing methods, etc., it is not necessary to consider the principles of same color matching, near color matching, and less color matching to achieve synchronization. The purpose is to improve color reproducibility and improve sample accuracy.
1. Same color matching
Due to the wide variety of dyes, the performance of each dye in the same type of dye is also different. When color matching, you must try to use various dyeing properties (directness, diffusion, Reactivity, color fastness, etc.) similar dyes. For example: when dyeing with reactive dyes, try to mix K-types and X-types, and try to avoid mixing K-types and The dyes are mixed together to ensure good color reproducibility and high sample accuracy during dyeing.
2. Near color matching
Near color matching means that when color matching, try to use dyes that are similar in color to the standard sample as the main color, and then choose mixed dyes.
3. Less color matching
Less color matching means that the fewer dyes are used, the better. Don’t use three colors if you can combine two colors. Try to avoid four colors. At the same time, Note that some commercial dyes themselves are blended. When using such dyes as the main color, the dyes used for blending should be as much as possible the ingredients of the blended dyes to reduce the number of dyes used. Because the more dyes there are, the worse the selective absorption of visible light and the worse the color brightness. In addition, the more color matching dyes, the worse the synchronization of dyeing, and the stronger the dependence on process conditions during dyeing. Slight changes in process conditions may affect the reproducibility of the color, thereby reducing the accuracy of the sample.
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