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2023

Discussion on the problems related to the color fastness of color-matched clothing

Color-blocked clothing generally refers to fabrics of different colors and sizes that are sewn together in a certain way. Because of the rapid development of the garment industry, the parts of clothing color-matching have developed from the traditional conventional parts such as collars, cuffs, and the outside of pants to all parts of today's clothing.

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Cause analysis

Color-blocked clothing is more likely to develop color staining after washing and drying, that is, the light-colored fabric is stained with the dyes in the dark-colored fabric.

Cotton fabrics are more likely to have staining problems, while polyester fabrics are less likely to stain staining. This is because the dyeing of cotton fibers is that cotton fibers swell violently under humid conditions, and the fiber gap increases, so that the dye molecules penetrate into the fiber, and some groups on the fiber combine with the dye, but this process is reversible in washing, so the cotton splicing fabric is prone to the problem of staining. Polyester dyeing is generally under high temperature and high pressure, the movement of fiber molecular chains intensifies, and a large void is formed instantly, so that the dye molecules penetrate into the interior of the fiber, when the dyeing is completed, the dye solution is cooled below the glass transition temperature of polyester, and the dye molecules are solidified in the fiber, and the dye molecules are insoluble in the conventional washing process, so the pure polyester fabric is not likely to have a staining problem after splicing.

In addition, the adsorption, diffusion, fixation, and cleaning of the dye on the fabric are not properly controlled from the dyeing process, resulting in the dye remaining on the fabric being re-absorbed and dyed by the white or light-colored part in the washing solution, resulting in staining. However, when today's designers are in color matching, they often consider the effect of color matching of clothing, that is, the appearance of clothing, and almost no one considers the color staining phenomenon after washing clothing from the perspective of design.

Case 1

At present, in the assessment of color fastness of national standards and garment industry standards, the limit of the index is generally only evaluated for the color fastness of monochrome products, and it is not enough to use this index to assess the color fastness of color-matched products.

There was once a consumer who bought a color-blocked floral skirt, which was made of 3 kinds of fabrics, namely beige cotton, light brown floral cloth, and dark brown petticoat. I didn't wear the skirt once I bought it, but I washed it with soap first, and as a result, the dark brown of the petticoat stained the beige skirt, like a piece of dirty spots, which could not be cleaned off, which seriously affected the wearing effect.

The fabric test report presented by the manufacturer shows that the color fastness of the three fabrics meets the requirements of the FZ/T81004-2003 standard and the requirements of the color fastness of GB 18401 class B, that is, the color fastness to washing and staining of first-class products is greater than or equal to grade 3-4, and the color fastness to washing and staining of the lining is not less than grade 3.

Case 2

In the assessment of color fastness of national standards and garment industry standards, there are no clear requirements for the color fastness of bag cloth, and there are no clear regulations on the selection of bag cloth.

A men's jacket, beige cotton fabric and lining, there are obvious black stains on the two slip pockets, turn the pockets of the jacket over, you can see that the pockets of this jacket are made of black cotton, from the appearance can not be seen at all, such a mix and match consumers can not predict the consequences of washing, there is no warning on the laundry label of the clothes "not washable", according to FZ/T81008- The testing requirements of the color fastness of the 2011 jacket clothing standard require that the color fastness to washing and staining of the jacket lining is not less than grade 3, and the color fastness to washing and staining of the first-class fabric is greater than or equal to grade 3-4, but it is not clearly stipulated whether the fabric of the pocket cloth is made of lining or fabric or the third other fabric, and there is also no requirement for the washing and staining of the pocket cloth. In order to save the consumption of the main materials, manufacturers will use other fabrics in the inventory to make more hidden pockets and other parts during production. However, if it is simply assessed in accordance with the various test items specified in the FZ/T81008-2011 jacket clothing standard, this dress is qualified.

Summarize the recommendations

1. Since the color fastness of color-blocked fabrics directly affects the appearance of the whole garment, it is recommended that the design of clothing should not only consider aesthetics, but also consider practicality, and strictly control the color fastness of color-blocked fabrics when selecting fabrics, so as to be responsible for product quality.

2. It is suggested that in the revision of clothing standards, the assessment index of color fastness to color-matched parts and the assessment index of fabric selection and color fastness of bag cloth should be added.

3. The staining of color-blocked garments will also be affected by soaking, washing, storage and other conditions, so consumers should wash and dry them in time after wearing them, which can help reduce the possibility of color matching between fabrics and splicing.

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