This standard specifies the product classification, marking, requirements, test methods, inspection rules and marking, packaging, transportation, and storage of flax and regenerated cellulose fiber blended color spun yarn. This standard is applicable to ring spun flax (including bleached flax) and recycled cellulose fiber blended color spun yarn. 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 2543.2 Textiles - Determination of Yarn Twist - Part 2: Untwist and Twist Method - GB/T 2910.22 Textiles, Quantitative Chemical Analysis: Part 22: Viscose Fibers, Certain Copper Ammonia Fibers, Modal or Lyocell Fibers and Flax Ramie mixtures (formic acid/zinc chloride method) GB/T 3292.1 Test methods for unevenness of textile yarn lines Part 1: Capacitance method GB/T 3916 Textiles - Determination of single yarn breaking strength and elongation at break (CRE method) GB/T 3920 Textiles - Tests for Color Fastness - Color Fastness to Rubbing GB/T 3921-2008 Textiles - Tests for Color Fastness to Soaping GB/T 4743-2009 Textiles - Determination of Linear Density of Yarn Wrapped in Rolls - GB/T 9994 Determination of Moisture regain for Textile Materials GB18401 National Basic Safety Technical Specification for Textile Products GB/T 29862- Identification of Fiber Content for Textiles - FZ/T 10008 Cotton and Chemical Fiber Pure Spinning, Blended Yarn Marking and Packaging FZ/T 10021-2013 Color Spinning Yarn Inspection Rules Classification: Linen and Recycled Cellulose Fiber Blended Color Spinning Yarn Products are classified based on different colors, fiber blending ratios, and linear densities

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