The active groups are monochloro-s-triazine and vinyl sulfone heterobi-reactive dyes. The commodity categories are named differently, mainly including M type, B type, RR type, BF type, BH type (partial), etc. The recommended dyeing temperature is 60～80℃. Due to the synergistic effect of two differen
KN type mostly refers to the middle-temperature reactive dyes whose reactive groups are vinyl sulfones. The recommended dyeing temperature is 45～60℃, with moderate reactivity. This type of dye is basically dyed in the form of ß-hydroxyethyl sulfone sulfate. Because of its low directness to the fiber
Reactive dyes generally have poor chlorine fastness, which mainly depends on the molecular structure of the color body. There are sulfonic or carboxylic acid groups at the ortho position of the diazo group of the dye, or there are sulfonates at the ortho or para position of the hydroxyl group of the
In the current printing and dyeing process, reactive dyes are one of the most widely used dyes. This is because reactive dyes are reactive dyes. The macromolecules of the dye contain reactive groups, which can react with the hydroxyl (-OH) or amino (-NH2) of the fiber during the dyeing process to fo
Why is the wet fastness and rubbing fastness poor when the reactive dyes dye the dark color of cotton? How to deal with it?(1) Reasons for poor fastness. Unlike direct dyes dyeing cotton, neutral (or acid) dyes dyeing nylon, disperse dyes dyeing polyester, reactive dyes dyeing cotton are not combine
For dyeing with reactive dyes, the choice of the three primary colors of dyes must be paid attention to by dyeing workers. Among them, the ratio shift value (Rf) of the dye is a very important parameter. The Rf value represents the affinity of the dye. During dyeing, it determines the instantaneous
What should I do if color spots and stains appear in reactive dyeing?Reactive dyes have a very good solubility in water. Reactive dyes mainly rely on the sulfonic acid groups on the dye molecules to dissolve in water. For meso-temperature reactive dyes containing vinylsulfone groups, in addition to
Dye characteristics: The reactivity of vinylsulfone-based reactive dyes is between dichloro-s-triazine and monochloro-s-triazine, and it is a medium-temperature reactive dye. It is characterized by acid and alkali resistance, so pre-alkali can be used during dyeing. Vinylsulfone-based dyes are brigh
Cationic dyes are a kind of textile dyes, also known as basic dyes and basic dyes. Dissolved in water, it is in cationic state. Cationic dyes are soluble in water and ionize in aqueous solution to generate dyes with positively charged colored ions. The cation of the dye can combine with the acidic g
Background: The large chemical raw material environment is constantly changing, existing suppliers are incapable, and customer requirements are constantly increasing.Challenge: The customer's existing supplier's product quality has problems, while the price remains high, and the customer plans to change suppliers.
Background: A small and medium-sized dyeing factory in Peru, mainly engaged in cotton fabrics used for printing and dyeing, they has been supplying the local market for many years. The goal is to increase the various of fabrics for printing and dyeing, such as polyester and acrylic, while consolidat