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How To Choose The Right Dye
Jan 19, 2019

1. Selecting dyes according to fiber properties Because of their different properties, various fibers require the use of compatible dyes when dyeing. For example, when cotton fiber dyeing, because its molecular structure contains many hydrophilic hydroxyl groups, it is easy to absorb moisture and puff, can react with reactive groups, and is more resistant to alkali, so it can choose direct, reduction, sulfurization, ice dye. And dyeing such as activity. Polyester is highly hydrophobic and not resistant to alkali at high temperatures. Under normal circumstances, the above dyes should not be used, but disperse dyes should be selected for dyeing.

2. Selecting dyes according to the use of dyed materials Because of the different uses of dyed materials, the requirements for the fastness of dyed finished products are also different. For example, cloth used as curtains is not washed frequently, but it is often exposed to sunlight. Therefore, when dyeing, dyes with high light fastness should be selected. As the dyeing of underwear and summer light fabrics, dyes with high washfastness, lightfastness and fastness to sweat should be selected because they should be washed frequently and exposed to the sun.

3. Selecting dyes according to the cost of dyes When selecting dyes, not only the color light and fastness, but also the cost and source of the dyes and additives used. For higher-priced dyes, try to use other dyes that can dye the same effect to reduce production costs.

4. Selection of dyes when color matching When dyeing is required, the dyes should be selected for their composition, solubility, color fastness, dye uptake and other properties. Due to the different dyeing properties of various dyes, the dyeing effect is often affected by the difference in temperature, solubility, and dye uptake. Therefore, when color matching is performed, it is necessary to select dyes with similar properties, and the closer the better, the better the control of the process conditions and the stability of the dyeing quality.

5.Selecting dyes according to dyeing mechanical properties Due to the different dyeing machinery, the properties and requirements of dyes are also different. If it is used for bubbling, it should use a dye with higher directness; for padding, it should choose a dye with lower directness, otherwise it will produce products that are not in conformity with the requirements of shallow depth, uneven color and so on.