Material & Construction
Composition, knit structure, GSM and width define the fabric you are selecting. They form the starting point for comparing qualities and planning the garment.
2009年創業のニット生地メーカー · 中国
品質と認証
ニット生地の品質と認証
生地は、製作する衣料品の中で機能することが求められます。組成や色から洗濯性能、証明書の適用範囲まで、重要な品質要件をひとつの明確な生地仕様にまとめるお手伝いをします。
仕様。根拠。信頼。
はじめに
生地とその衣料用途
評価
承認済みサンプルと関連する試験
文書化
合意した仕様とご注文要件
01
Quality Starts with the Right Fabric
Bring the end use into the fabric decision, then carry the approved specification through the order.
Colour & Hand Feel
Use the selected sample and colour reference to describe the finish you want. Lab-dip approval gives custom colours a clear reference before bulk production.
The Finished Garment
Wash behaviour, pilling, colourfastness and recovery matter differently for a summer tee, a fitted top or loungewear. Testing should reflect the way the garment will be used.
02
Fabric Performance That Matters to Your Collection
The most useful test is one that answers a real product requirement. The method and acceptance level are agreed for the selected fabric.
| Property | Why it matters | Testing focus |
|---|---|---|
| Dimensional change | Fit after washing | Length and width change under the chosen wash and drying procedure |
| Pilling | Surface appearance in wear | Surface change under the agreed procedure and number of cycles |
| Colourfastness | Colour retention and transfer | Washing, rubbing or perspiration conditions relevant to the garment |
| Stretch & recovery | Movement and shape retention | Fabric direction, extension and recovery under defined conditions |
| Fabric strength | Suitability for the application | The appropriate strength test for the knit and intended use |
| Product-specific requirements | Your brand or market specification | Any additional tests included in the agreed order specification |
03
Our Certificates: OEKO-TEX®, GOTS, GRS, OCS and FSC™
Runtang Textile holds five current textile certifications: OEKO-TEX® STANDARD 100 (Product Class I, baby articles), GOTS 6.0, GRS 4.0, OCS 3.0 and FSC™ Chain of Custody. Each card shows what the certificate covers, who issued it and how long it is valid. A certificate applies only to the products and processes in its scope, so for a certified-material order we confirm the right document for the fabric you choose.
OEKO-TEX® STANDARD 100
Product Class I – baby articles
- Issued by
- TESTEX AG, Swiss Textile Testing Institute
- Covers
- Knitted fabrics, including brushed fabrics, in cotton and cotton blends with polyester, elastane or CREORA® spandex; viscose, modal and their elastane blends; polyamide/elastane and polyester/elastane. Bleached, yarn-dyed, piece-dyed, printed (reactive, discharge, pigment, plastisol) and digital or disperse transfer printed.
- Valid until
- 15 October 2027
GOTS 6.0
Global Organic Textile Standard
- Issued by
- Bureau Veritas Consumer Products Services
- Covers
- Dyed fabrics. Processes: buying house, warehousing and distribution, knitting, dyeing and finishing.
- Valid until
- 12 October 2027
GRS 4.0
Global Recycled Standard
- Issued by
- Bureau Veritas Consumer Products Services
- Covers
- Dyed fabrics with recycled content. Processes: buying house, warehousing and distribution, knitting, dyeing and finishing.
- Valid until
- 12 October 2027
OCS 3.0
Organic Content Standard
- Issued by
- Bureau Veritas Consumer Products Services
- Covers
- Dyed fabrics with organic content. Processes: buying house, warehousing and distribution, knitting, dyeing and finishing.
- Valid until
- 7 April 2027
FSC™ 加工流通認証
For FSC-certified viscose
- Issued by
- SGS Hong Kong Limited
- Covers
- Purchasing and sales (transfer system) of FSC 100%, FSC Mix and FSC Recycled viscose yarn and textile fabric. Standard FSC-STD-40-004 V3-1.
- Valid until
- 3 November 2028
Need certified fabric for your collection?
Tell us the standard your buyer requires (OEKO-TEX®, GOTS, GRS, OCS or FSC™) and the fabric you are looking at. We confirm it is within scope before you order.
Ask about your certification requirement →Certificates for a shipment
A GOTS, GRS or OCS scope certificate shows that we are certified. It does not prove that a particular shipment is certified: that is done with a Transaction Certificate (TC). If your order needs certified material, tell us at the enquiry stage so it is planned from the yarn onward.
Name on the certificates
The certificates show our former registered name, Foshan Runtang Textile And Dyeing Co., Ltd. Our company is now RUNTANG TEXTILE CO., LTD. It is the same company, and the certification bodies will update the name at the next renewal.
Certificate numbers
Certificate and licence numbers are hidden in the images on this page. We send them on request so you can check each certificate in the issuer's public database.
04
Read a Report in the Context of Your Order
A test result becomes useful when it is connected to the fabric you are buying. Here is a real example: an SGS report on one of our chenille knit fabrics, tested in May 2026 for an apparel order.
Fabric: chenille knit, 99% polyester / 1% elastane, colour “Dark Night” (navy), for garments
Laboratory: SGS-CSTC Standards Technical Services, Guangzhou
Tested: 19–22 May 2026
| Test | Method | Result | Required |
|---|---|---|---|
| Colourfastness to washing: colour change | ISO 105-C06:2010, A2S, 40 °C | Grade 4-5 Pass | Min. 4 |
| Colourfastness to washing: staining (acetate, cotton, polyamide, polyester, acrylic, wool) | ISO 105-C06:2010, A2S, 40 °C | Grade 4 to 4-5 Pass | Min. 3-4 |
| Fibre content | ISO/TR 11827, ISO 1833-1 and ISO 1833-20 | 99.6% polyester, 0.4% elastane Pass | 99% polyester, 1% elastane |
| AZO dyes (22 restricted aromatic amines) | EN ISO 14362-1:2017, REACH Annex XVII Entry 43 | Not detected (reporting limit 5 mg/kg) Pass | Max. 30 mg/kg each |
| 生地の目付 | ISO 3801:1977, Method 5 | 446 g/m² | As specified |
Buyer name, style and order numbers are hidden for confidentiality. Download the full report (PDF, 6 pages) →
The Identified Fabric
The item, composition, colour and sample or lot reference connect the report to the material under review. In this report: chenille knit, 99% polyester / 1% elastane, colour Dark Night.
The Actual Test
The method, conditions, result and units show what was measured. Here, ISO 105-C06 A2S means a 40 °C wash with steel balls, rated on the 1–5 grey scale where 5 is best.
Your Acceptance Standard
The agreed order requirements establish the acceptance level. In this report each result sits next to the buyer’s required level, so the Pass is easy to check.
05
Quality & Certification Questions
Can you work with our brand testing requirements?
Yes. Your testing protocol can form part of the fabric discussion, including the methods, acceptance levels and reports required for the order.
Does a higher GSM mean better quality?
GSM describes fabric weight. The right quality also depends on composition, construction, finish and suitability for the garment. A lightweight summer T-shirt and a heavyweight streetwear tee need different fabric choices.
Does one certificate cover every fabric?
No. A certificate applies within its stated holder, validity and scope. Certification information needs to match the selected fabric and the order.
Can I evaluate a fabric before a bulk order?
Yes. Samples can be requested for fabric selection, wash testing and trial garments. Sample availability and any sample or courier charges are confirmed before dispatch.
Is your OEKO-TEX® certificate suitable for babywear?
Our OEKO-TEX® STANDARD 100 certificate is Product Class I, the class for baby articles with the strictest limits for harmful substances. It covers the knitted fabrics listed in its scope, so we confirm that the fabric you choose is included before you order.
Can I get a Transaction Certificate (TC) for my GOTS, GRS or OCS order?
A Transaction Certificate is the document that proves a specific shipment is certified; the scope certificate alone does not. Tell us at the enquiry stage that your order needs a TC, so the certified yarn and paperwork are planned before production starts.
How can I verify your certificates?
Each certificate can be checked in the issuer's public database: OEKO-TEX® Label Check, the GOTS certified supplier database, the Textile Exchange database for GRS and OCS, and the FSC certificate search. We send the certificate numbers on request.
Why do your certificates show Foshan Runtang Textile And Dyeing Co., Ltd.?
That is our former registered name. The company is now RUNTANG TEXTILE CO., LTD.; it is the same company, and the certification bodies will update the name at the next renewal.
06