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  • How to improve the fixation rate and color fastness of reactive dyesⅠ


    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

  • Why reactive dyes have low fixation rate and poor color fastnessⅡ


    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

  • Why reactive dyes have low fixation rate and poor color fastnessⅠ


    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

  • What are the color fastness of textiles?


    The color fastness of textiles usually includes resistance to soaping, rubbing, light, bleaching or oxidation (reducing agent), ironing, perspiration and perspiration. Among them, soaping resistance, friction resistance, light resistance, water resistance and perspiration resistance are several colo Read More

  • Classification of color fastness


    In the quality inspection of textile color fastness, rubbing color fastness is one of the very important inspection items, and the test result is directly related to the overall color fastness of the fabric. Because some dyes with poor color fastness can cause different degrees of harm to the human Read More

  • Why is the color fastness of disperse dyes poor?


    Disperse dyeing mainly uses high temperature and high pressure when dyeing polyester fibers. Although the disperse dye molecules are small, it cannot guarantee that all the dye molecules enter the fiber during dyeing. Some disperse dyes will adhere to the fiber surface, resulting in poor fastness. I Read More

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