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accessories t/c pocketing manufacturers take you to understand the light fastness standard of reactive dyes
- Categories:Industry News
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- Time of issue:2022-09-23 16:10
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(Summary description)accessories t/c pocketing manufacturers tell you how to improve the dyeing fastness of printing and dyeing fabrics to meet the increasingly fierce textile market demand, which has become a research topic in the printing and dyeing industry.
accessories t/c pocketing manufacturers take you to understand the light fastness standard of reactive dyes
(Summary description)accessories t/c pocketing manufacturers tell you how to improve the dyeing fastness of printing and dyeing fabrics to meet the increasingly fierce textile market demand, which has become a research topic in the printing and dyeing industry.
- Categories:Industry News
- Author:
- Origin:
- Time of issue:2022-09-23 16:10
- Views:
accessories t/c pocketing manufacturers tell you how to improve the dyeing fastness of printing and dyeing fabrics to meet the increasingly fierce textile market demand, which has become a research topic in the printing and dyeing industry. Such as the light fastness of reactive dyes dyed light-colored fabrics, the wet rubbing fastness of dark-colored fabrics; the decrease in wet treatment fastness caused by the thermal migration of disperse dyes after dyeing; and the high chlorine fastness, perspiration-light fastness degree, etc.
accessories t/c pocketing manufacturers tell you that there are many ways to improve color fastness. Through years of production practice, printing and dyeing practitioners have explored the selection of appropriate dyeing and chemical auxiliaries, improving dyeing and finishing processes, and strengthening process control. Some methods and measures have improved and improved the color fastness to a certain extent, which basically meets the market demand.
As we all know, reactive dyes dyed on cotton fibers are attacked by ultraviolet rays under sunlight, and the chromophore or auxochromophore in the dye structure will be damaged to varying degrees, resulting in color change or light color, that is, The problem of light fastness.
accessories t/c pocketing manufacturers tell you that my country's national standards have already stipulated the light fastness of reactive dyes. For example, the GB/T411-93 cotton printing and dyeing cloth standard stipulates that the light fastness of reactive dyed fabrics is 4-5, and printed fabrics The light fastness is grade 4; GB/T5326 standard for combed polyester-cotton blended printing and dyeing fabrics and FZ/T14007-1998 standard for cotton-polyester blended printing and dyeing fabrics stipulate that the light fastness of dispersed/reactive dyed fabrics is grade 4, and the printed fabric is also grade 4. . It is more difficult to achieve this standard for light-colored printed fabrics dyed with reactive dyes.
The light fastness of reactive dyes is mainly related to the parent structure of the dye, 70-75% of the parent structure of reactive dyes is azo type, and the rest is quinone type, phthalocyanine type and alpha type. The light fastness of azo type is poor, and the light fastness of anthraquinone type, phthalocyanine type and formazan is better. The molecular structure of the yellow reactive dye is azo type, the parent chromophore is pyrazolone and naphthalene trisulfonic acid, and the light fastness is good. Excellent fastness, the molecular structure of red chromatographic reactive dyes is azo type. Accessories t/c pocketing manufacturers tell you that the light fastness is generally low, especially for light colors.
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Ministry of Foreign Trade: 010-67897338
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Company Email: tianma@tianmainterlining.com
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