Latest News and Updates on Textile Auxiliaries and Dyes

2.3 Choose the right dyeing processThe dyeing process has a great influence on the color fastness of the dyed product. For example: Improper chemical materials, hydrolysis of dyes, and excessively hard water quality, resulting in dye aggregation and precipitation; improper color-fixing conditions, l Read More

1. Methods and ways to improve the color fixing rateImproving the fixation rate of reactive dyes can be considered from the selection of dyes and the dyeing process: dyes with high directness and low reactivity have a large amount of adsorption by fibers and are not easy to be hydrolyzed. Fixation r Read More

2.2 Factors affecting color fastnessDyeing fastness refers to the ability of dyed products to maintain their original color and luster under the action of external factors during use or post-dyeing processing.There are many factors that affect the color fastness, mainly including the chemical compos Read More

Reactive dye molecules contain active groups, which can be covalently bonded with carboxyl, amino and hydroxyl groups on fibers, and can be used for fiber dyeing such as cellulose fibers, protein fibers and nylon. There are also some unsatisfactory aspects of reactive dyes, such as the fact that the Read More

The solubility of reactive dyes can be roughly divided into four categories:Class A, dyes containing diethylsulfone sulfate (ie vinylsulfone) and three reactive groups (monochloro-s-triazine + divinylsulfone) have the highest solubility, such as Yuanqing B, Tibetan blue GG, Tibetan blue RGB, golden Read More

Reactive dyes have a very good dissolution state in water. Reactive dyes mainly rely on the sulfonic acid group on the dye molecule to dissolve in water. -Ethylsulfonyl sulfate is also a very good solubilizing group.In the aqueous solution, the sodium ion on the sulfonic acid group and the -ethylsul Read More

Cotton fiber belongs to natural cellulose fiber. Cotton fabric has soft hand feel, good moisture absorption and air permeability and excellent wearing performance. As people pay more and more attention to wearing health and advocating nature, cotton fabric is loved by people. Reactive dyes are one o Read More

1 Choose the right dyeThe color fastness is closely related to the structure of the dye, and the selection of the dye should consider:① Strong reactivity between dyes and fibers;②High fixation rate;③It has better acid-base stability;④ The bond energy of the covalent bond of the dye-fiber is high, th Read More

Reactive dyes mainly include s-triazine and vinyl sulfone types, especially vinyl sulfone type dyes, when encountering alkali, the solubility decreases and the reactivity increases sharply. . Brilliant blue KN-R is easy to aggregate and has poor solubility. Especially after adding Yuanming powder, i Read More

Chlorine gas is generally used as a disinfectant in tap water. Therefore, when washing clothes or swimming, the dyes in the clothes will react with a small amount of effective chlorine remaining in the tap water to degrade the dyes, resulting in changes in the color of the clothes. Dyes that are eas Read More

Reactive dyes have a wide chromatogram, bright color, excellent performance and strong applicability, and their hue and performance are basically in line with the market's requirements for fibers and clothing. Reactive dyes can achieve high levels of fastness properties, especially wet fastness, wit Read More

1. Solubility High-quality reactive dyes have good water solubility in commercial applications. The solubility and the concentration of the dye solution are related to the selected bath ratio, the amount of electrolyte added, the dyeing temperature and the amount of urea and other factors. The react Read More