This standard specifies the product classification, marking, requirements, test methods, inspection rules and markings, packaging, transportation, and storage of linen and polyester blended color spun yarn. This standard applies to ring spun flax (including bleached flax) and polyester 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 2910.11 Quantitative Chemical Analysis of Textiles - Part 11; Blends of cellulose fibers and polyester fibers (sulfuric acid method) GB/T 3292.1 Test Method for Unevenness of Yarn Lines in Textiles Part 1; GB/T 3916 Capacitance Method for 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 47432009 Textiles - Determination of Yarn Yarn Linear Density by Twist Yarn Method (GB/T 9994) - Common Moisture Return of Textile Materials (GB18401) - National Basic Safety Technical Specifications for Textile Products (GB/T 29862) - Identification of Fiber Content in Textiles (FZ/T 10008) - Marking and Packaging of Pure and Blended Cotton and Chemical Fiber Yarns (FZ/T 10021) - Inspection Rules for Color Spinning Yarns (3) - Product Classification, Mark 3.1 Classification: Linen and polyester blended yarn products are classified according to color, fiber blending ratio, and linear density. 3.2 Mark 3.2.1 The raw material code for linen and polyester blended color spinning is represented by English letters, L - linen, T - polyester. 3.2.2 The blending ratio of flax and polyester blended color spun yarn is expressed in a predetermined mass ratio and marked in descending order of fiber content. 3.2.3 The color code (or color card number) of linen and polyester blended yarn shall be compiled according to the requirements of the production enterprise or customer. 3.2.4 When marking flax and polyester blended yarn with a code, the color code (or color card number), fiber blending ratio code, and linear density shall be marked in sequence

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