Four principles to follow in the selection of tarpaulin dyes

Plastic tarpaulin wholesalers say that when dyeing tarpaulins, there are four principles to follow for the selection of dyes: 1. Select dyes according to the use of the dyed object: according to the use of the dyed object , the requirements for color fastness of dyed products are also different. For example, the cloth used for curtains is not washed very much, but it is often exposed to the sun, so when dyeing, you should choose a sun-resistant dye. As the dyeing of underwear and light-colored fabrics worn in summer, due to frequent washing and sun exposure, please choose dyes that are washable, light-resistant and sweat-resistant. 2. Select dyes according to the properties of the fibers: the properties of each fiber are different, and appropriate dyes need to be selected when dyeing. For example, when cotton fiber is dyed, because its molecular structure contains a large number of hydrophilic hydroxyl groups, it is easy to absorb moisture and expand, chemically react with reactive groups, and is resistant to alkali. Therefore, dyes such as reduction, vulcanization, ice dye, and reactive dyes can be directly selected for dyeing. . Polyester has strong hydrophobicity and high temperature alkali resistance. Generally, the above dyes are not selected, but disperse dyes must be selected for dyeing. 3. Select dyes according to the cost of dyes: When choosing dyes, not only the shading and fastness, but also the cost and supply source of the dyes and the auxiliaries used must be considered. For higher-priced dyes, try to replace them with other dyes that can dye the same effect to reduce production costs. 4. Selection of dyes during color matching: When color matching is required, when selecting dyes, pay attention to their composition, solubility, fastness, dyeing rate and other properties. Due to the different dyeing properties of various dyes, the dyeing effect is often affected by differences in temperature, solubility, and dyeing rate. Therefore, when performing color comparison, it is necessary to select dyes with similar properties. The closer the better, the better the control of process conditions and the stability of dyeing quality.

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