This standard specifies the size, requirements, test methods, judgment rules, product instructions, packaging, transportation, and storage of knitted arm covers. This standard is applicable to the evaluation of the quality (including weaving and sewing) of knitted arm covers mainly composed of various textile fibers. 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) - Test Methods for Color Fastness to Sweat (GB/T 4856) - Packaging of Cotton Knitted Fabrics (GB5296.4) - Instructions for the Use of Consumer Goods - Part 4: Textiles and Clothing (GB/T 5713) - Tests for Color Fastness to Water (GB/T 6529) - Standard Atmosphere for Moisture Conditioning and Testing (GB/T 7573) - Determination of pH of Water Extraction Solution (GB9994) - Textile Materials GB/T 17592 Determination of Prohibited Azo Ammonia Dyes in Textiles GB/T 17592 GB/T 18401 National Basic Safety Technical Specification for Textile Products FZ/T 01026 Quantitative Chemical Analysis of Textiles Four component Fiber Mixtures FZ/T 01053 Identification of Textile Fiber Content FZ/T 01057 (All Parts) Test Method for Textile Fiber Identification FZ/T 01095 Test Method for Fiber Content of Spandex Products GSB16-2159 Standard Depth Sample Card for Knitted Products (1/12) GSB16-2610 Color Sample of Surface Defects on Socks

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