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GuideBy Wren Thunderborn, Head of Content

OEKO-TEX Standard 100 (Appendix 4 vs 6) vs GRS: How to Verify Mill Certificates in Official Registries

OEKO-TEX Standard 100 tests chemical safety (with Appendix 6 setting stricter limits than Appendix 4), while GRS tracks recycled content from bottle flake to woven roll. Here is how to verify Anhui Wurun Textile Co., Ltd. (Weaverine) in both official registries.

Rolls of woven polyester fabric in a mill warehouse ready for OEKO-TEX and GRS lot verification.

When home-textile buyers audit a polyester mill, two certificates sit at the top of the compliance checklist: OEKO-TEX® Standard 100 and the Global Recycled Standard (GRS).

Buyers frequently ask two practical questions during vendor onboarding:

  1. How do OEKO-TEX® Standard 100 (especially Appendix 4 vs. Appendix 6) and GRS differ in what they actually test and cover?
  2. How do you look up our mill in the official OEKO-TEX® Buying Guide and the Textile Exchange GRS database when the registry records the legal factory name rather than the export brand domain?

Here is the complete breakdown, using our live registry records as a worked example.

1. OEKO-TEX® Standard 100 vs. GRS: Two Different Jobs

Neither certificate replaces the other because they audit two completely different dimensions of a fabric program:

DimensionOEKO-TEX® Standard 100Global Recycled Standard (GRS)
Primary Question Answered"Is this fabric chemically safe for human skin contact?""Is the recycled polyester (rPET) content genuine and traceable?"
Applies ToBoth virgin and recycled polyester fabrics (greige, peachskin, satin stripe, blackout)Only regenerated / recycled polyester programs (typically ≥ 20% recycled content; ≥ 50% for GRS consumer labeling)
How It WorksLaboratory chemical testing of the physical textile against the Restricted Substance List (RSL)Chain-of-custody mass-balance auditing from bottle-flake/chip supplier → yarn spinner → weaving mill → finisher
Order-Level DocumentAnnual Certificate verified via the OEKO-TEX® Buying Guide & Label CheckFacility Scope Certificate (SC) + a per-shipment Transaction Certificate (TC) issued against your commercial invoice

2. Inside the OEKO-TEX® Buying Guide: Appendix 4 vs. Appendix 6

When you look up Anhui Wurun Textile Co., Ltd. (233300 Bengbu City, Anhui Province, China) in the OEKO-TEX® Buying Guide, you will see three columns on the right side of the directory row: Appendix 4, Appendix 6, and Recycling.

Our listing carries the green checkmark under Appendix 6. Why does that distinction matter on a purchase order?

OEKO-TEX® AnnexWhat It CoversWhy Appendix 6 Matters to EU & US Buyers
Appendix 4(Baseline Limits)Standard human-ecology limit values across Product Classes I–IV (baby, direct skin contact, no skin contact, furnishing materials).Meets basic retail chemical safety requirements, with looser thresholds on certain extractable heavy metals and process residuals.
Appendix 6(Stricter Detox / ZDHC Limits — Weaverine Certified ✓)Tightened limit values originally introduced to align with Greenpeace Detox and ZDHC (Zero Discharge of Hazardous Chemicals) MRSL expectations.Enforces significantly stricter caps on alkylphenols (AP/APEOs), phthalates, per- and polyfluoroalkyl substances (PFAS), chlorophenols, and extractable heavy metals—giving bedding and drapery brands a wider compliance margin for EU REACH and US state regulations.

3. How to Read the Textile Exchange GRS Registry Line by Line

In the Textile Exchange Certified Companies Directory, GRS records are indexed by the audited legal manufacturing site and its Textile Exchange ID (TE ID)—and the public table intentionally omits marketing URLs so every lookup is anchored to legal customs and audit identifiers.

Here is how to read each column of our live GRS Site Listing (Last Updated: 2026-10-20):

Registry ColumnWeaverine's Verified RecordWhat This Field Means for Your Compliance Team
Certification BodyKaiXin(Kaixin Certification (Beijing) Co., Ltd.)The accredited third-party auditing body that inspects our weaving facility and issues Transaction Certificates (TCs).
Certified Organization NameANHUI WURUN TEXTILE CO., LTDOur legal manufacturing entity (安徽五润纺织有限公司) registered in Bengbu City, Anhui Province—the exact name that appears on our mill business license and export customs declarations.
TE IDTE-00016096Our permanent, unique Textile Exchange Site ID. Even when an annual Scope Certificate renews, the TE ID never changes.
License Number60003825The certification body's internal license number for our audited facility.
Country/AreaChinaPhysical weaving location (Bengbu City, Anhui Province).
SC NumberKCB-TE-00016096-GRS-2512Our active Scope Certificate (SC) number confirming our facility is authorized to weave and sell GRS-certified polyester.
SC Version NumberKCB-TE-00016096-GRS-2512-7The -7 suffix indicates version 7 of the active Scope Certificate (updated on 2026-10-20 as new product scopes or yarn suppliers are added).
Standard & SC StatusGRS · ValidConfirms active Global Recycled Standard status eligible to issue shipment-specific Transaction Certificates.

4. Why Registries List "Anhui Wurun Textile Co., Ltd." Instead of "Weaverine"

A common source of confusion for first-time importers is searching a certification database for a supplier's English brand name (Weaverine) or website (weaverine.com) and coming up empty—or seeing a Chinese legal name (Anhui Wurun Textile Co., Ltd.) without a clickable website column.

  • Audit registries bind to the legal factory license: Under both Textile Exchange (ASR-101) and OEKO-TEX® rules, the certificate holder name must match the government-issued business license (Unified Social Credit Code / LEI 836800DY3VR511JU0L14) and the commercial invoice/bill of lading exporter name so customs and brand compliance teams can reconcile shipments without entity mismatches.
  • How the two names connect: Anhui Wurun Textile Co., Ltd. (安徽五润纺织有限公司) is the legal weaving mill in Bengbu, Anhui (650+ waterjet looms); Weaverine (weaverine.com / weaverine.cn) is our international B2B brand and digital specification platform. Both names—along with TE-00016096, KCB-TE-00016096-GRS-2512, and LEI 836800DY3VR511JU0L14—are published together on our Certifications page so your compliance team can verify the chain in one step.

5. What to Put on Your Purchase Order When You Need Both

If your bedding, curtain, or upholstery program requires certified chemical safety and/or verified recycled content, write the requirement on the purchase order before production begins:

  1. For OEKO-TEX® Standard 100 compliance: Specify OEKO-TEX® Standard 100 Appendix 6 on the PO line alongside your target GSM and cuttable width.
  2. For GRS recycled polyester (rPET) claims:
    • A Scope Certificate (KCB-TE-00016096-GRS-2512) proves our mill is certified to produce GRS goods, but it does not certify an individual container by itself.
    • If your retail hangtag requires a GRS claim, request a GRS Transaction Certificate (TC) on the PO before weaving starts so we allocate certified rPET yarn lots and submit the shipping weight (kg—estimable via the Roll Metres & Weight Calculator) and commercial invoice to KaiXin within the mandatory post-shipment window.

To download our current certificate PDFs, verify our TE-00016096 scope, or request certified fabric swatches, visit our Certifications hub or request a quote.

Questions buyers ask

What is the difference between OEKO-TEX Standard 100 and GRS?
OEKO-TEX Standard 100 is a chemical-safety standard that tests fabric for harmful substances and restricted chemicals (regardless of whether the yarn is virgin or recycled). GRS (Global Recycled Standard) is a chain-of-custody standard that verifies recycled material content (such as rPET), social and environmental processing criteria, and per-shipment Transaction Certificates (TC).
What is the difference between Appendix 4 and Appendix 6 in OEKO-TEX Standard 100?
Appendix 4 is the baseline limit-value catalog for standard textile products. Appendix 6 enforces stricter chemical residue limits across perfluorinated compounds, heavy metals, phthalates, and volatile organic compounds—aligned with global Detox / ZDHC manufacturing targets.
Why does the registry list Anhui Wurun Textile Co., Ltd. instead of Weaverine?
Both OEKO-TEX and Textile Exchange register the audited legal manufacturing entity shown on the factory business license and customs export records—Anhui Wurun Textile Co., Ltd. (安徽五润纺织有限公司) in Bengbu City, Anhui Province—while Weaverine (weaverine.com) is our international export brand.
What do TE ID, License Number, and SC Number mean in the Textile Exchange GRS database?
TE ID (TE-00016096) is the permanent Textile Exchange facility identifier; License Number (60003825) is the certifier's audit license; and SC Number (KCB-TE-00016096-GRS-2512) is the active Scope Certificate number, where the trailing suffix (-7) tracks the latest amended version.
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