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color fastness

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  • The Magic of Vat Dyes: Vibrant and Long-lasting Colors for Textiles


    Vat dyes are a popular choice in the textile industry, known for their exceptional color fastness and resistance to fading. This article explores the fascinating world of vat dyes, their unique dyeing process, and their versatility in creating vibrant and long-lasting colors for various textile appl Read More
  • 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
  • Color fastness


    Color fastness is a kind of color fastness, also called color migration fastness or color fastness to bleeding. It refers to the migration and staining of dye or residual floating color on the fabric, which mainly reflects the fabric after washing or raining. The degree of contamination that causes Read More
  • Which PH value is required for water in dyeing process?


    For reactive dyeing, when the pH value is 7-9, the color difference of the product is normal, indicating that the pH range has little effect on the color difference of the product, and the presence of a small amount of alkali will not change or destroy the chromogenic group of the reactive dye molec Read More



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