This standard specifies the terms and definitions, product classification, specifications, requirements, testing methods, sampling rules, judgment rules, and product instructions for use, packaging, transportation, and storage of knitted sports protective equipment. This standard is applicable to knitted sports protectors that are woven and formed by knitting technology with textile fiber as the main raw material or made of knitted fabric and polyurethane foam materials, including ankle and leg protection, knee protection, waist protection, wrist protection, arm and elbow protection, shoulder protection, headband and other products. This standard does not apply to knitted sports protectors for infants and young children aged 36 months and below. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 250 Textiles - Evaluation of Color Fastness - Grey Sample Card for Discoloration GB/T 2910 (All Parts) - Quantitative Chemical Analysis of Textiles GB/T 2912.1- Determination of Formaldehyde in Textiles - Part 1: Free and Hydrolyzed Formaldehyde (Water Extraction Method) GB/T 3920 Textiles - Tests for Color Fastness to Rubbing (GB/T 3921-2008) - Tests for Color Fastness to Soap (GB/T 3922) - Tests for Color Fastness to Sweat (GB/T 4856) - Packaging of Cotton Knitted Fabrics (GB/T 5296.4) - Instructions for the Use of Consumer Goods - Part 4: Textiles and Clothing (GB/T 5713) - Tests for Color Fastness to Water (GB/T 7573) - Determination of pH Value of Water Extraction Solution (GB/T 8170) - Rules for Rounding off Values and Representation and Determination of Limit Values (GB/T 8170) GB/T 8427-2019 Textiles - Tests for Color Fastness - Color Fastness to Artificial Light: Xenon Arc GB/T 8629-2017 Textiles - Household Washing and Drying Procedures for Testing GB/T 14576 Textiles - Color Fastness Tests - Light Fastness Sweat Composite Color Fastness GB/T 16988 Determination of Content of Special Animal Fibers and Sheep Wool Mixtures GB/T 17592 Textiles Determination of Prohibited Azo Dyes GB/T 17593.1 Textiles Determination of Heavy Metals Part 1: Atomic Absorption Spectroscopy GB/T 17593.2 Textiles Determination of Heavy Metals Part 2: Inductively Coupled Plasma Atomic Emission Spectroscopy GB/T 17593.4 Textiles Determination of Heavy Metals Part 4: Arsenic Mercury Atomic Fluorescence Spectrophotometer GB18401 National Basic Safety Technical Specification for Textile Products GB/T 23315 Adhesive Straps GB/T 24121 Testing Methods for Broken Needle Residues in Textile Products GB/T 24153 Rubber and Elastomer Materials - Determination of N-nitrosamine GB/T 29862 Identification of Fiber Content in Textiles

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