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UK Compliance for Korean Recycled-Polyester Knit Fabric: REACH, GRS, and Labelling Guide

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Korean recycled-polyester performance knit fabric hero

UK sourcing managers evaluating Korean recycled-polyester performance knit fabric must clear four compliance gates before goods can legally reach the UK market: UK REACH chemical restrictions, OEKO-TEX Standard 100 certification, GRS recycled-content chain-of-custody documentation, and UK fibre composition labelling. Every gate has its own set of rules that diverged from EU requirements after Brexit. This guide maps each step and tells you exactly what to request from your Korean mill before placing a bulk order.

The UK Compliance Landscape After Brexit

UK Market Entry: Five Compliance Steps for Korean rPET Knit Fabric

  1. 1

    UK REACH Chemical Testing

    Request third-party test reports confirming APEOs are at or below 100 mg/kg and formaldehyde is at or below 75 mg/kg, plus an SVHC declaration from the Korean mill

  2. 2

    OEKO-TEX Standard 100 Certificate (Class II)

    Confirm the mill holds a current Class II certificate; check that BPA limit reflects the updated 10 mg/kg threshold in force from April 2025

  3. 3

    GRS Scope Certificate and Transaction Certificate

    Obtain the mill's GRS Scope Certificate and request a separate Transaction Certificate with each individual shipment

  4. 4

    UK Fibre Composition Label

    Verify the label reads '88% recycled polyester / 12% elastane' in English, in descending order of weight, per SI 2012/1102

  5. 5

    Certificate of Origin for UK-Korea FTA

    Secure a certificate of origin and confirm your UK EORI number to claim zero duty at UK customs

Since January 2021, the UK has run its own chemical safety law — UK REACH — managed by the Health and Safety Executive (HSE) rather than ECHA. The UK has also retained its own textile labelling regulations (SI 2012/1102) and a separate bilateral free trade agreement with South Korea. These frameworks run parallel to their EU counterparts but are updated and enforced independently.

For an 88% recycled polyester / 12% spandex circular knit fabric, all four layers apply at the same time. UK REACH restricts specific chemical substances in the fabric. OEKO-TEX Standard 100 provides documented evidence that those limits have been met. The Global Recycled Standard (GRS) provides the paper trail behind any recycled-content claim. And SI 2012/1102 defines exactly how the fibre composition must appear on the label in English.

Getting even one layer wrong — an outdated test report, a missing Transaction Certificate, or a label that uses a non-permitted fibre term — can result in a delayed shipment or a Trading Standards investigation.

UK REACH: The Chemical Rules for Every Washable Knit

UK REACH and EU REACH Are Now Separate Legal Systems

UK REACH and EU REACH Are Now Separate Legal Systems

Since Brexit, UK REACH is managed by the UK Health and Safety Executive (HSE), while EU REACH is managed by ECHA. An EU REACH declaration prepared for a continental European importer does NOT satisfy UK REACH requirements. Always request UK REACH-specific SVHC declarations and chemical test reports from your Korean mill.

UK REACH restricts specific substances in textiles sold in the UK. Three provisions apply directly to washable performance knit fabric.

Nonylphenol ethoxylates (APEOs / NPEOs). Per the UK Government (GOV.UK), UK REACH Annex XVII entry 46a limits nonylphenol ethoxylates in washable textiles — those reasonably expected to be laundered in water during their normal life cycle — to a maximum of 100 mg/kg. This restriction came into force on 3 February 2021. APEO residues from older surfactant processing can linger in recycled polyester feedstock, so always request a third-party test report that explicitly confirms this limit.

Formaldehyde. UK REACH Annex XVII entry 72 limits formaldehyde in consumer-facing textile articles to 75 mg/kg, per REACH compliance specialist Certivo. Moisture-wicking and anti-odour finishes common on performance jersey are a known source. Request a test report from an accredited laboratory covering this limit as a standard document.

SVHC Candidate List disclosure. Per the UK Health and Safety Executive (HSE), if a Substance of Very High Concern appears in an article above a concentration of 0.1% by weight (w/w), the supplier must provide the substance name and sufficient safe-use information to recipients. For consumer-facing articles, this information must be provided free of charge within 45 days of a request.

A key point for UK buyers: EU REACH declarations written for continental European importers do not satisfy UK REACH. The two systems are now maintained and updated separately. Always ask your Korean mill for UK REACH-specific documentation.

OEKO-TEX Standard 100: Pre-Clearance Evidence for UK Buyers

Per the OEKO-TEX Association, OEKO-TEX Standard 100 tests textile products against a list of over 1,000 harmful substances. Coverage includes REACH Annex XVII restricted substances and the HSE/ECHA SVHC Candidate List. For a UK sourcing manager, a valid certificate significantly reduces the time needed to verify individual chemical test reports.

Selecting the right product class. OEKO-TEX assigns products to one of four classes based on intensity of skin contact:

  • Class I: babies and toddlers (strictest limits)
  • Class II: articles with direct skin contact, including activewear and sportswear
  • Class III: articles that do not come into direct skin contact, such as jacket linings
  • Class IV: decorative articles with no skin contact

For a 220 gsm performance jersey worn against the skin, Class II is the applicable class. Confirm that your mill's certificate specifies Class II, not Class III.

2025 limit update. Per the OEKO-TEX Association, effective 1 April 2025, the permitted limit for Bisphenol A (BPA) was lowered from 100 mg/kg to 10 mg/kg under revised OEKO-TEX Standard 100 regulations. A certificate issued before this date may not reflect the current limit. Check the issue date and request a refreshed certificate if the existing one pre-dates April 2025.

Annual renewal. Certificates are valid for one year and require annual renewal through an accredited testing body, per the OEKO-TEX Association. Verify the current certificate at oeko-tex.com before placing a large order.

OEKO-TEX Standard 100 confirms chemical compliance. It does not certify recycled content. For that, you need the Global Recycled Standard.

GRS Chain of Custody: The Paper Trail for a Recycled Claim

The Global Recycled Standard (GRS), governed by Textile Exchange, provides the document framework that allows a UK brand to substantiate recycled-content claims in marketing and on product labels.

Per Textile Exchange, GRS chain of custody depends on two distinct certificate types that work together.

Scope Certificate (SC). Issued to the Korean mill as a facility, this confirms that the operation is GRS-certified and its processes meet the standard. You can verify a current Scope Certificate in the Textile Exchange public database before sending a purchase order. A Scope Certificate covers the facility; it does not cover a specific shipment.

Transaction Certificate (TC). Issued per individual shipment, a TC confirms that the specific goods transferred in that consignment conform to GRS. Every delivery of GRS-certified fabric must be accompanied by its own TC. Requesting only the Scope Certificate and not following up with a TC on each order is one of the most frequent errors UK importers make.

Per Textile Exchange, mills must maintain physical or geographic segregation of GRS-certified and non-certified materials and undergo annual third-party audits. If your Korean mill also runs non-recycled polyester on the same lines, ask specifically how material segregation is managed.

Per the Hohenstein Institute (an OEKO-TEX accredited testing body), pre-consumer PET bottles are explicitly banned as a recycled input source under both OEKO-TEX and GRS standards. Confirm that your mill sources from post-consumer PET, such as collected plastic bottles.

UK Textile Labelling: English Requirements Under SI 2012/1102

Per UK Legislation (legislation.gov.uk), the UK Textile Products (Labelling and Fibre Composition) Regulations 2012 (SI 2012/1102) require all textile products sold in the UK to carry a durable, English-language label showing fibre composition in descending order of weight percentage.

For an 88% recycled polyester / 12% spandex circular knit, the compliant label reads:

88% recycled polyester / 12% elastane

Key rules per UK Legislation:

  • Only fibre names listed in the permitted schedule (Annex I of assimilated EU Regulation 1007/2011) may be used. "Polyester" is a permitted term. "Spandex" is not — the correct permitted term is elastane.
  • "Recycled" may be voluntarily added if it is accurate and not misleading.
  • Fibres must appear in descending order of weight percentage.
  • The UK importer of record bears legal responsibility for label compliance.

These rules apply to fabric rolls supplied to UK manufacturers, not only to finished garments.

UK-Korea FTA: How to Claim Zero Duty

Per the UK Fashion and Textile Association (UKFT), the UK-Korea Free Trade Agreement provides preferential (zero) tariff access for Korean textiles and knit fabric that satisfy the agreement's rules of origin requirements. An upgraded UK-Korea FTA was signed in December 2025.

EU cumulation remains active. The EU cumulation provision — which allows EU-sourced inputs to count as Korean-originating content for rules-of-origin purposes — has been extended to 1 July 2027, or the date of entry into force of the new agreement, whichever comes first, per UKFT.

To claim the zero rate at UK customs, per Customs-Declarations.UK:

  1. Obtain a certificate of origin from your Korean mill confirming FTA eligibility.
  2. Classify the goods correctly under Chapter 60 of the UK Global Online Tariff (knitted or crocheted fabrics).
  3. Tie your customs entry to your UK EORI (Economic Operator Registration and Identification) number.

For the specific 10-digit commodity code applicable to elastane-containing circular knit fabric and the exact duty rate, check the HMRC UK Global Online Tariff directly. The rate depends on the precise sub-heading and should be confirmed there, not assumed.

Your Pre-Order Document Checklist

Pre-Order Document Checklist — Korean rPET Knit Fabric to the UK

  • ✓ SVHC DeclarationConfirms no Candidate List substance exceeds 0.1% w/w; supplier must respond to consumer requests within 45 days under UK REACH
  • ✓ APEO / NPE Test ReportThird-party lab confirmation: nonylphenol ethoxylates at or below 100 mg/kg (UK REACH Annex XVII entry 46a)
  • ✓ Formaldehyde Test ReportThird-party lab confirmation: formaldehyde at or below 75 mg/kg (UK REACH Annex XVII entry 72)
  • ✓ OEKO-TEX Standard 100 Certificate (Class II)Issue date within last 12 months; verify the current certificate at oeko-tex.com
  • ✓ GRS Scope CertificateConfirms the Korean mill is a GRS-certified facility; verify via the Textile Exchange public database
  • ✓ GRS Transaction CertificatePer-shipment document confirming these specific goods conform to GRS; required with every consignment
  • ✓ UK fibre composition label sample or specificationEnglish text, fibres listed in descending weight order; the UK importer bears legal responsibility for accuracy
  • ✓ Certificate of originRequired to claim preferential (zero) tariff under UK-Korea FTA; tie to your UK EORI number

Frequently Asked Questions

Does OEKO-TEX Standard 100 satisfy UK REACH, or do I also need separate UK REACH test reports?
OEKO-TEX Standard 100 covers the same substance categories that UK REACH restricts — including SVHC Candidate List substances and Annex XVII substances like APEOs and formaldehyde — per the OEKO-TEX Association. However, OEKO-TEX is a voluntary certification, not a legal substitute for UK REACH compliance. Most UK importers treat a valid OEKO-TEX certificate as their primary evidence and supplement it with batch-specific third-party test reports for APEOs and formaldehyde when buyers or Trading Standards request them.
What is the exact APEO limit for washable performance knit fabric under UK REACH?
Per the UK Government (GOV.UK), UK REACH Annex XVII entry 46a limits nonylphenol ethoxylates (APEOs / NPEOs) in washable textiles to a maximum of 100 mg/kg, equivalent to 0.01% by weight. The restriction applies to clothing and textiles reasonably expected to be laundered in water during their normal life cycle and has been in force since 3 February 2021.
What GRS documents must my Korean mill supply?
Two document types are required, per Textile Exchange: a Scope Certificate confirming the mill is a GRS-certified facility, and a Transaction Certificate accompanying each individual shipment confirming those specific goods conform to GRS. Verify the Scope Certificate in the Textile Exchange public database before placing an order. Request a Transaction Certificate with every delivery — not just the first one.
How does UK REACH differ from EU REACH since Brexit?
Per the UK Health and Safety Executive (HSE), UK REACH is now a separate legal register maintained by the HSE, not by ECHA. The restricted substance lists overlap significantly but are updated on independent schedules. A UK importer cannot rely on EU REACH declarations prepared for continental importers. Request UK REACH-specific SVHC declarations and chemical test reports from your Korean mill.
Can I get zero import duty on Korean knit fabric under the UK-Korea FTA?
Yes, provided the fabric meets the agreement's rules of origin requirements. Your Korean mill must supply a certificate of origin confirming FTA eligibility. The EU cumulation provision — allowing EU-sourced inputs to count as Korean originating content — has been extended to 1 July 2027, per UKFT. Confirm the applicable commodity code and rule of origin with your UK freight forwarder or customs broker before the first shipment.

Work With a Verified Korean Supplier

Clearing four UK compliance gates simultaneously requires specific documentation from your Korean mill before the order ships. Working with a supplier that already holds a current OEKO-TEX Standard 100 Class II certificate, an active GRS Scope Certificate, and experience producing batch-specific UK REACH test reports reduces due-diligence time on every order.

If you are evaluating Korean recycled-polyester performance knit fabric for the UK market and want to verify a specific mill's documentation package, contact us using the link below.

Last updated: 2026-06. This guide is for informational reference only. Regulations change. Verify current requirements with the UK Health and Safety Executive (HSE), HMRC, and a qualified UK trade compliance professional before making sourcing or import decisions.

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