Analysis and improvement of unqualified textile routine testing items (1)
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Detection items |
Main influencing factors |
Main changes in physical and chemical properties |
Corresponding improvement measures |
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01 |
Washing/Soaping Washing |
Floating color; restoration Chemical substances, active chlorine and oxygen bleach, etc. |
Fabric color floating off and re-staining on the surface; dye development The conjugated system undergoes oxidation or reduction reaction |
Intensify washing; use high-fastness dyes and color fixation treatment |
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02 |
Dry cleaning Drycleaning |
Floating color; dissolution of dye Performance |
Fabric color will fall off and re-stain on the surface; similar materials will dissolve |
Intensify washing; use high-fastness dyes and color-fixing treatments |
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03 |
Rubbing Rubbing/ Crocking |
Floating color; fabric structure and surface material |
Floating colors on the surface of the fabric fall off and re-stain; when the dye is rubbed, the bond breaks and falls off |
Intensify washing; use high-fastness dyes, color-fixing treatment and reduce the friction coefficient of the fabric surface |
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04 |
Sun/Lightfast Light |
Floating color; sunlight, reducing substances, active chlorine and oxygen bleach, etc. |
Oxidation or reduction reaction of dye matrix or chromogenic conjugated system |
Intensify washing; use high-sunlight dyes and sunfastness enhancers |
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05 |
Sweat stains Perspiration |
Floating color; effects of reducing, oxidizing substances and pH value, etc. |
Floating colors fall off and re-stain on the fabric surface; oxidation or reduction reactions occur in the dye matrix or the color conjugated system |
Intensify washing; use high-fastness dyes and color-fixing treatments |
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06 |
Water stain Water |
Floating color; dye’s own binding force |
The surface of the fabric floats off and stains again; the bond between the dye and the fiber is broken |
Intensify washing; choose high fastness Dye and fixation treatment |
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07 |
Washing Laundering |
Floating colors; reducing substances, active chlorine and oxygen bleach, etc. |
Fabric The floating color on the surface falls off and stains back |
Intensify water washing; use high-wash dyes and color fixation treatment |
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08 |
Chlorine Bleach Chlorine Bleach |
Floating color; active chlorine |
The surface of the fabric is discolored due to floating or oxidation |
Intensify washing; screen dyes and apply chlorine-resistant enhancer Equation |
Under a given pressure, rub the fabric in circles to cause the sample to break |
Improve the degree of cross-linking and cohesion between fibers and yarns; reduce the friction coefficient of the fabric surface |
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27 |
Fabric Weight Fabric Weight |
Fabric structure and processing Method |
Weight per unit area of fabric |
Stretching, shrinking or weighting treatment; applying weighting agent |
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28 |
Latitude/skew Distortion |
Fabric structure |
Distortion during the setting process |
Second setting |
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29 |
pH value pH value |
Fabric dyeing and processing methods |
The pH value of the solution after fabric extraction or cooking |
Acid, alkali or buffer system neutralization |
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30 |
Formaldehyde Formaldehyde Content |
Fabric processing methods (such as 2D resin finishing) |
Formaldehyde content in the solution after fabric extraction or distillation |
Cleaning agent removal, chemical reaction; application of formaldehyde remover |
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31 |
Azo dyes are prohibited AZO Dyes |
Types of dyes in processing |
Whether it contains 24 banned carcinogenic aromatic amines |
Choose appropriate dyes |
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32 |
Alkylphenol polyoxyethylene ether APEO |
Yarn, fabric dyeing and processing methods (emulsifiers, oils, etc.) |
APEO content in fabrics exceeds the standard |
Cleaning with detergent, use professional cleaning agent |
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