Commonly used dyes for wool dyeing include acid dyes (including strong acid dyes and weak acid dyes), acid mordant dyes, 1:2 metal complex dyes, reactive dyes for wool, Lanna free and easy dyes, etc. Different dyes have different chemical structures and properties. The reactivity of dyes with wool and dyeing auxiliaries is different. Therefore, the dye uptake speed and dyeing amount are different, and the diffusion properties of dyes inside wool fibers are also different. Therefore, the key point of low-temperature dyeing is dye adaptation. sex. At present, low-temperature dyeing research and application has been carried out at home and abroad, but only three kinds of dyes have been used, which is worth noting.
Level dyeing, color fastness and exhaustion rate are the main dyeing properties. Low-temperature dyeing is to increase the low-temperature dyeing speed of the dye, but it is detrimental to the leveling properties, so low-temperature dyeing must pay attention to leveling issues. In various low-temperature dyeing studies at home and abroad, except for a few that focus on level dyeing, most low-temperature dyeing ignores this issue. The color fastness of low-temperature dyeing includes sunlight, washing, perspiration, friction, etc. The research must consider testing multiple color fastnesses, color reproduction and dyeing, and the degree of change in fiber dyeing, both of which are related to the dyes used and the degree of dyeing. Depends on dyeing temperature. Therefore, it is necessary to evaluate the dyeing characteristics of dyes in a series of temperatures from the perspective of color reproduction and exhaustion. The information provided earlier on dyes for wool was based on boiling dyeing, and dyeing at other temperatures is questionable.
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