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It is recommended that the dyes used for color repair should have the following properties:①Dyes will not become slow dyeing due to the influence of surfactants. When the color correction operation is carried out, a large amount of anionic surfactant contained in the dye remains in the dye solution, Read More
The Secretary-General of the World Health Organization Tan Desai recently stated that in the four weeks of July, the number of confirmed cases around the world increased by 80%. Southeast Asia, which is ravaged by the Delta variant virus, is currently the most severely hit by the epidemic. The indus Read More
1. Direct dyes Structural properties: Direct dyes are a kind of water-soluble anionic dyes. Most of the dye molecules contain sulfonic acid groups, and some have carboxyl groups. The dye molecules and cellulose molecules are combined by van der Waals forces and hydrogen bonds. Dyeing objects and met Read More
The so-called tarification of dyes refers to the process in which dye particles and surfactants agglomerate into coal tar-like substances under high temperature conditions.There are usually the following 4 factors that cause dye tarizationPoor pretreatment and insufficient purification. The oil (lub Read More
As direct dyes and other accelerating agents for cotton dyeingWhen dyeing cotton with direct dyes, sulphur dyes, vat dyes and Yindioxin dyes, sodium sulfate can be used as a dye-promoting agent.These dyes are easy to dissolve in the prepared dyeing liquor, but not easy to dye cotton fibers. Because Read More
1. Strength. The power is high, the amount of dye used is relatively reduced, and the problems of processing wastewater and pollution are relatively easy to solve.2. Customer's request. The customer is God, if the customer has a clear request to use imported dyes or a certain brand of dyes, the comp Read More
When polyester-cotton blended fabrics are dyed in hot melt, the color matching dyes must also have the same properties as the monochromatic dyes. The melting temperature and time should be compatible with the fixing characteristics of the dye to ensure the highest color yield. Each single color dye Read More
The same color effect (solideffect or union-dye effect) means that two fibers are dyed into similar hue or tone, and the apparent color is deep or the color is similar in intensity, and the color vividness is also close. If expressed by the color characteristic value, the same color effect means tha Read More
Dyes are easy to aggregate, have poor solubility, poor compatibility, and are too sensitive to temperature and pH, which are prone to color mottling and chromatic aberration. For example, the active turquoise blue KN-R is easy to produce colored flowers. Read More
