This standard specifies the specifications, requirements, test methods, acceptance rules, packaging, marking, transportation, and storage of linen yarn for knitting. This standard is applicable to the identification of the quality of linen yarn for wet spinning knitting and serves as a unified regulation for handover acceptance. The following normative references are essential for the application of this document. For dated references, only the dated version is used in 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 3292.1 Textiles - Test Method for Uneven Yarns - Part 1: Capacitance Method GB/T 3916- Determination of Single Yarn Breaking Strength and Elongation at Break of Textile Wrapped Yarns GB/T 3920 Textiles - Color Fastness Tests to Rubbing GB/T 3921-2008 Textiles - Color Fastness Tests to Soap GB/T 3922 Textiles - Test Method for Color Fastness to Sweat GB/T 4743-2009 Textile Wrapping GB/T 4841.3 Determination of Linear Density of Yarn Twist Yarn Method GB/T 4841.3 Dye Dyeing Standard Depth Color Card 2/1, 1/3, 1/6, 1/12, 1/25GB 5296.4 Instructions for Use of Consumer Goods GB/T 5713 Textiles - Color Fastness Tests to Water GB/T 6152-1997 Textiles - Color Fastness Tests to Heat and Color Fastness GB/T 8427-2008 Textiles - Color Fastness Tests to Artificial Light - Color Fastness to Incense Arc

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