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  • What are the properties of reactive dyes


    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

  • What are the shortcomings of the performance of reactive dyes?


    Intermediate temperature reactive dyes have the problem of "unevenness", which is prone to dyeing defects such as color spots, chromatic aberrations, and stains. This is because there are two major defects in the dyeing performance of moderate temperature reactive dyes:①The stability of salt and alk Read More

  • What is the reaction mechanism of reactive dyes?


    Reactive dyes are used for cellulose fiber dyes, generally through three stages of adsorption, diffusion and fixation:There is no covalent bond reaction between the dye and the fiber during the adsorption and diffusion process. When the alkali agent is added to make the pH of the dye bath alkaline, Read More

  • What are the leveling agents for reactive dyes


    For the dyeing of cellulose fibers, the proportion of reactive dyes is currently the largest. Reactive dyes are water-soluble dyes containing reactive groups that can chemically combine with macromolecules such as cotton, wool and silk, so the soaping and rubbing of dyed fabrics The fastness is very Read More

  • What are the major categories of reactive dyes?


    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 Read More

  • What does the reactive dye KN type mean?


    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 Read More

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