Common dyes for wool dyeing include acid dyes (including strong acid dyes, weak acid dyes), acid medium dyes, 1:2 metal complexes and dyes, hair reactive dyes, Lanna spray dyes, and the like. Different dyes have different chemical structures and chemical properties. The dyes have different reactivity with wool and dyeing assistants, so the dye dyeing speed and dyeing amount are different, and the dyes have different diffusion properties inside the wool fibers. Therefore, the low temperature dyeing point is dye adaptation. Sex. At present, low temperature dyeing research and application have 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 dyeing rate are the most important dyeing properties. Low-temperature dyeing is to improve the dyeing speed of dyes at low temperature, but it is not good for leveling. Therefore, low-temperature dyeing should pay attention to the problem of leveling. In addition to a small number of low temperature dyeing studies at home and abroad, most low temperature dyeing ignores this problem. The color fastness of low temperature dyeing includes sun exposure, water washing, perspiration, friction, etc. The study must consider the test of a variety of color fastness, color reproduction and exhaustion, and the degree of fiber transfection, both of which are related to the dye used. The dyeing temperature is related. Therefore, it is necessary to evaluate the dyeing properties of the dye at a range of temperatures from the perspective of color reproduction and exhaustion. The dye information for wool previously provided is based on boiling dyeing, and dyeing at other temperatures is questionable.
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