Scope

This standard specifies the specifications, types, requirements, inspection methods, judgment rules, product usage instructions, packaging, transportation, and storage of knitted colored cotton underwear This standard is applicable to the evaluation of the quality of knitted colored cotton underwear made from natural colored cotton (with a content not less than 20%)

Normative References

The clauses in the following documents become clauses of this standard through reference in this standard.

. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard

GB/T 250 Textiles - Evaluation of Color Fastness - Grey Sample Card for Discoloration

GB/T 251 Textiles - Evaluation of Color Fastness - Grey Sample Card for Staining - GB/T 1335 (All Parts) - Clothing Size Types

GB/T 291o (All Parts) - Quantitative Chemical Analysis of Textiles

GB/T 2912.1 Textiles - Determination of Formaldehyde - Part 1: Free Hydrolyzed Formaldehyde (Water Extraction Method)

GB/T 3920 Textiles - Tests for Color Fastness to Rubbing

GB/T 3922 Textiles - Test Method for Color Fastness to Sweat

GB/T 4802.1 Textiles - Pilling Test for Fabrics - Circular Trajectory Method

GB/T 4856 Packaging of Cotton Knitted Fabrics

GB 5296.4 Instructions for Use of Consumer Products - Instructions for Use of Textiles and Clothing

GB/T 5713 Textiles - Color Fastness to Water

GB/T 6411 Knitted Underwear Size Series

GB/T 7573 Textiles Determination of pH value of water extraction solution

GB/T 8170 rounding rules and representation and determination of limit values

GB/T 8629 Textile Testing Procedures for Household Washing and Drying

GB/T 8878 Cotton Knitted Underwear

GB/T 14801 Test Methods for Weft Skew and Bow Weft of Machine and Knitted Fabrics

GB/T 17592 Textiles Determination of Prohibited Azo Dyes

GB/T 17593.1 Textiles - Part 1: Determination of Heavy Metals; Atomic absorption spectrophotometry

GB/T 17593.3 Textiles - Determination of heavy metals - Part 3: Hexavalent chromium spectrophotometric method

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

100% inspection and testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Testing and testing characteristics:

1. The testing industry is fully covered, meeting different testing needs

2. Fully cover the laboratory and allocate localized testing nearby

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China