How To Color Match Dyes？

One is to adjust by adding a small amount of other dyes to approximate colors, that is, non primary color matching.

Secondly, it is mainly composed of the three primary colors, supplemented by individual special colors such as green, black, brown, etc.

1、 Non primary color matching.

The traditional color matching view point holds that it is generally advisable to avoid using single color dyes for color matching as much as possible.

If the required color is a third color, it should be combined with a third color dye or a combination of a third color and a second color dye.

This idea is guided by the principle of harmonious use of colors, in order to achieve stable reproduction of colors in production.

Non primary colors such as bright red+orange+green, yellow+green+gray, dark brown+yellow brown+black, etc., due to the increase or decrease in the amount of each secondary or tertiary dye, will result in an increase or decrease in the proportion of secondary or primary color components, slowing down the speed of adjusting color and hue, resulting in a milder possibility and amplitude of change, and thus improving the stability of color.

This method is particularly popular in the woolen industry.

2、 Three primary colors for color matching

With the development of science and technology, especially electronic technology and optical technology entering the field of printing and dyeing, the control accuracy and precision in printing and dyeing production have been greatly improved.

The traditional color matching viewpoint has been strongly challenged, and modern color matching viewpoint is gradually taking the dominant position. The modern perspective on color matching emphasizes the use of contrasting colors, achieving stable reproduction of color in large-scale production through high-precision control, including accurate reproduction of small and large samples.

In this way, the three primary colors came into being for color matching. The characteristic of color matching of the three primary colors is that each primary color dye has a dominant position in hue and color, so the variation amplitude is large, the reflection result is sharp, and the variation is severe.

1. Selection of three primary colors:

From the perspective of solid color theory, the three primary colors of dyes should be magenta, yellow, and cyan.

But the selection of dyes should consider the compatibility of dyeing process conditions, such as temperature, time, and pH range. Are the process requirements for dyeing rate, bath ratio, etc. the same. Whether the solubility, compatibility index, fastness, blending compatibility, and post-treatment process conditions are similar. Under the above conditions, considering the purity of the primary color, the purer the better.

However, due to various limitations, sometimes non mixed dye varieties of single compounds with wide absorption peaks, which belong to secondary or even tertiary colors from a chromaticity perspective, will also be selected as primary colors.

Sometimes when there is an irreconcilable conflict between the requirements of hue and color and the process conditions, it is necessary to comply with the requirements of hue and color.

For very bright secondary colors, if there are no pure primary colors in this type, it is necessary to have yellow light red, blue light red, red light yellow, blue light yellow, red light blue, yellow light blue. It's not that once the three primary colors are selected, everything will be fine. Like the S-type primary colors in dispersed dyes, due to the presence of some primary colors in each type, but with different proportions, only the third color types can be used.

2. The technical foundation of three primary color matching:

The color matching of the three primary colors requires corresponding technical means due to the dominant position of each primary dye in hue and color, with a large range of changes. Firstly, comprehensive measurement work needs to be carried out, mainly including precise determination of the effective content of dyes (with an accuracy of less than 1%), and precise determination of the difference in dye uptake between small and large samples. Secondly, the measurement of dyeing and chemical materials in large-scale production must be absolutely guaranteed. We need modern technological means and strict management measures.

3. The economic advantages of three primary color matching:

Compared with non three primary color matching, the latter has a narrower color adaptation range, and the variety of dye inventory must be wider, resulting in a larger total inventory of dye reserves and a higher occupation of working capital. The use of three primary colors for color matching has the following advantages.

① It has a wide range of color adaptability and can save most of the secondary color dye varieties.

② The color matching of the three primary colors is basically not constrained by the changes in popular colors and different color preferences in different regions, because any color change cannot be separated from the foundation of the three primary colors.

③ The adjustment of hue and color light is very quick and sensitive.

④ Reduce production costs. Inventory of dyes can be reduced, and some tertiary dyes are blended products, which will increase the selling price after blending.

⑤ The technical conditions for color matching of the three primary colors can make the dyeing hue and color light basically stable.

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