When evaluating the quality of textiles, it is based on the technical requirements in the standard, and the grading rule is the criterion. It is carried out by means of the measuring clamp of the quality standard towel. Especially for kindergarten clothes, which children wear, it is particularly important to have a strict and correct identification of fabrics. In quality standards, the influencing factors of quality are mainly divided into internal quality and external quality. Following is a brief introduction of cotton fabric as an example.
(1) Quality standard of pure cotton natural color cloth: pure cotton natural color cloth is mainly inspected and evaluated according to seven quality indexes of fabric structure, width, density, breaking strength, NEP impurity defect rate, NEP defect rate and fabric surface defect. Grade can be classified into high-quality goods, first-class goods, second-class goods and third-class goods, lower than third-class goods for foreign goods. Cotton natural color cloth is graded on the basis of piece, fabric structure, width, fabric surface defects are graded on the basis of piece, density, breaking strength, NEP impurity defect rate and NEP defect rate are graded on the basis of criticism, and the lowest one among them is discussed as the product of the cloth. Specific scoring criteria depend on the defect situation.
(2) Quality standard of cotton printing and dyeing fabrics: quality inspection of cotton printing and dyeing fabrics includes internal quality inspection and external quality inspection. The intrinsic quality includes weft density, breaking strength, washing size change and dyeing fastness. The exterior quality includes local defects and dispersive defects. It can also be divided into top-grade, first-class, second-class, third-class and other foreign products. It should be determined according to the lowest level of the intrinsic quality and appearance quality.
The dyeing fastness test of cotton printing and dyeing cloth includes six items: light fastness, washing fastness, friction fastness, perspiration fastness, ironing fastness and brushing fastness. Local defects include warp defects, weft defects, breakage, edge defects and weaving defects. They are graded according to the length of defects, and dispersive defects are graded according to different types of defects, such as width deviation, color difference and skew.
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