This standard specifies the requirements, test methods, inspection rules, packaging, and marking for colored spun mulberry silk in simple packaging. This standard is applicable to the double strand colored spun mulberry silk with simple decoration after singeing. Blended colored spun plain spun silk with a content of over 50% of mulberry silk shall be referred to for implementation. 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 3916 Textiles - Determination of Breaking Strength and Elongation at Break of Single Yarn in Roll Yarns GB/T 3920 Textiles - Tests for Color Fastness to Rubbing GB/T 3921-2008 Textiles - Tests for Color Fastness to Soaping GB/T 3922 Textiles - Test Methods for Color Fastness to Sweat GB/T 4841.1 Dye Dyeing Standard Depth Color Card 1/T 5713 Textiles - Tests for Color Fastness to Washing GB/T 6529 Textiles - Humidity Control Standard Atmosphere for Testing GB/T8170 Rules for Rounding off Values and Representation and Determination of Limit Values GB/T 8427-2008 Textiles - Tests for Color Fastness - Color Fastness to Artificial Light: Xenon Arc GB9994- Common Moisture regain of Textile Materials GB/T 18401- National Technical Specification for Basic Safety of Textile Products FZ/T 01026- Quantitative Chemical Analysis Methods for Four Component Fiber Blended Products FZ/T 01048- Determination of Silk/Cashmere Blending Ratio FZ/T 01053- Identification of Fiber Content FZ/T 01057 Test Method for Identification of Textile Fibers (All Parts) FZ/T 40003-2010 Test Method for Silkworm Silk

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