GOTS and RCS Certified Production: How We Cut Our Carbon Footprint

What exactly do GOTS and RCS verify?

Saying a fabric is "organic" or "recycled" is easy; proving it requires auditing. GOTS (Global Organic Textile Standard) and RCS (Recycled Claim Standard) exist precisely to close that evidence gap. Each verifies something different and they are often used together.

GOTS is a holistic standard for textiles that contain a defined minimum proportion of certified organic fibre (organic cotton, for example). It covers not only the organic origin of the fibre but also the chemicals used in dyeing and finishing, wastewater treatment and social criteria. In other words, GOTS answers both "is this fibre organic?" and "did this fibre pass through an environmentally and socially responsible process?" at the same time.

RCS is a narrower, more focused standard: it tracks and verifies the proportion of recycled material (recycled polyester, for example) in a product. The core task of RCS is to safeguard the accuracy of the content claim; saying "this product contains 50% recycled content" only carries weight when it is backed by the RCS document chain. Both standards are part of KARCEM's portfolio; alongside them are complementary certifications such as GRS for recycled content, OCS and BCI for non-organic sustainable cotton, and RCS and UPMADE® for a responsible raw-material flow.

Traceability: a single broken link disproves the claim

Both GOTS and RCS put traceability (chain of custody) at the heart of the audit. The logic is simple: if a certified fibre cannot be tracked with documentation at every point of hand-off in the production chain, the claim in the final product becomes unreliable too. A single untraceable link disproves the entire chain.

In practice this means matching every batch by mass balance, from its incoming document to its outgoing shipment: how much certified fibre went in, how much certified fabric came out? The independent auditor periodically compares these records against invoices and shipping documents. That is why certified production is built not on "good faith" but on auditable data — the same principle as KARCEM's overall production approach: quality that is measured and recorded.

GOTS, OCS, GRS, RCS, BCI, UPMADE: which certificate meets which requirement?

A certificate is not always “better”; the right one is whatever the target market and the customer require. Content-tracking standards (OCS/RCS) verify that a fiber is organic or recycled but set no criteria for the processing stage; full standards (GOTS/GRS) also audit social, environmental and chemical requirements. The table below maps these six standards to the purchasing decision.

KARCEM holds these six certificates within its own scope and coordinates contract partners that carry the matching scope; this means being able to respond from a single point of contact, within the applicable scope, to different requirements ranging from organic to recycled and sustainable cotton. For the current list and scope of our certificates, you can refer to the Certificates page.

What is the difference between a Scope Certificate and a Transaction Certificate?

Two distinct documents put certified production into practice, and when they are confused the verification chain quietly breaks. A Scope Certificate (SC) shows that a facility is certified under a given standard — for example GOTS or RCS — and for specific product categories; it carries a validity of one year and defines only what may be produced within that scope. A Transaction Certificate (TC), by contrast, is issued separately for each shipment: it proves that the certified content of that batch was actually delivered, together with the weight and mass balance. In short, the SC answers the question "is this facility authorised?", while the TC answers "is the fabric in this box really certified?".

In B2B procurement the correct reflex is not to be satisfied with seeing only the SC, but to request the TC for the relevant shipment; because it is the shipment-based TC that actually closes the mass balance. A supplier may hold a valid SC, but if it cannot demonstrate that batch's certified content with a TC, the claim is not auditable.

How do you verify a certificate before purchasing?

A certificate image is not sufficient on its own against forgery. Every major standard (GOTS, the Textile Exchange family) has an online public database; the licence number and the name of the certified organisation can be verified there. Four elements to check during verification: the document's validity date (an expired SC does not carry the claim), the scope (does the certificate cover knitting yarn or finished fabric?), the accredited certification body and the standard version. The table below summarises which document proves which question.

These steps are in line with KARCEM's general principle: a claim carries value only when it is measurable and recordable. Not only the existence of the certificate but also its validity and scope must be audited.

Do content certificates substitute for chemical safety and colour fastness tests?

No — and this distinction is frequently overlooked when writing a procurement specification. Standards such as GOTS and RCS verify content, traceability and (in the full standards) process responsibility; however, they do not measure the physical performance of the finished fabric. A fabric not bleeding colour in the wash, withstanding perspiration or rubbing is assured by separate fastness tests, while limits on substances harmful to human health are covered by a separate framework such as OEKO-TEX. In other words, a "GOTS-certified" fabric carries no commitment regarding colour performance unless it has also been put through fastness testing.

In practice three layers are requested together: content/traceability (GOTS, RCS), chemical safety (OEKO-TEX-class harmful-substance thresholds) and performance (fastness and physical tests). On the KARCEM side, colour consistency corresponds to this performance layer and is measured and recorded with the target ΔE<1. The table below separates these three verification layers.

For this reason a complete specification should include, alongside the question "which certificate?", the question "which fastness thresholds and which ΔE tolerance?". A content certificate and a performance test do not replace one another but work side by side; for the full equivalents of textile terms you can refer to the Glossary page.

Frequently asked questions

What is the difference between GOTS and RCS, and are both required at the same time?

GOTS (Global Organic Textile Standard) is a holistic standard covering the origin of the organic fibre, the dyeing/finishing chemicals, wastewater treatment and social criteria. RCS (Recycled Claim Standard) is narrower: it only tracks and verifies the proportion of recycled content in a product. In a blended fabric (e.g. organic cotton + recycled polyester) each claim must be proven separately; a single certificate does not cover both at once.

Which certificate includes the full set of criteria (social/environmental/chemical), and which only tracks content?

The full-criteria standards are GOTS and GRS: alongside content, they also audit ILO social, environmental and chemical (MRSL/wastewater) requirements. OCS and RCS, by contrast, are content-tracking standards only; they verify that a fibre is organic or recycled but set no criteria for the processing stage. BCI operates at farm level with mass balance, while UPMADE covers production-waste reduction and circularity.

What are the minimum content thresholds for GOTS and GRS?

GOTS requires ≥70% organic content for organic natural fibre; on the product label, the "organic" claim requires ≈95%, while "made with organic" applies to the 70–94% range. GRS requires ≥20% recycled content to certify, and ≈50% for a product claim. OCS tracks 5–100% organic content, while RCS tracks ≥5% recycled content. The right certificate is the one your target market and customer demand.

Does certification alone lower the carbon footprint?

No; certification in itself does not directly lower carbon. GOTS and RCS verify content and process accountability. What lowers the carbon footprint is how production is set up. At KARCEM the concrete levers that deliver this are: reduced intermediate transport and waste through a coordinated, geographically close contract network, process-water recovery and a renewable-energy share at the audited contract facilities KARCEM coordinates, a ZLD roadmap and low-impact fibre selection.

How is traceability (chain of custody) verified in practice?

Traceability is the heart of the audit: if a certified fibre cannot be tracked with documentation at every point of transfer in the chain, the claim on the final product becomes unreliable; a single untraceable link discredits the whole chain. In practice every lot is matched by mass balance, from the incoming document to the outgoing shipment. An independent auditor periodically cross-checks these records against invoices and shipping documents.

Which verified sustainability metrics does KARCEM share?

KARCEM relies on measurable, auditable process levers rather than unverifiable figures: recovery of process water and a renewable-energy share at the audited contract facilities it coordinates, ZDHC MRSL-compliant chemical management and a roadmap heading towards zero liquid discharge (ZLD). Rather than giving a single absolute carbon number, it shows the levers that reduce impact; because a number that cannot be audited is worth less than a process that is.

The real levers that cut carbon footprint

An important distinction: the certificate itself does not directly cut carbon. GOTS and RCS verify content and process responsibility; what cuts the carbon footprint is how production is set up. At KARCEM, that set-up rests on several concrete levers.

1. A coordinated, geographically close network: cutting transport and waste from the very start

Most of the time the bulk of the carbon accumulates not in the product itself but in the movements between production steps. In a loose chain where knitting, dyeing, printing and finishing are spread across distant, uncoordinated firms, every intermediate stage means trucks, packaging, waiting and rework. Because KARCEM knits in-house and keeps dyeing, printing and finishing within a vetted, geographically close contract network under one point of contact, intermediate transport is largely reduced. Coordinating the chain in one hand also reduces waste: single-source quality control reduces the re-dyeing and scrap that arise from batch–colour inconsistency — and every metre of fabric not reworked means energy and water not spent.

2. Water recovery: closing the process-water loop

Dyeing and finishing are the most water- and energy-intensive steps in textiles, because the water has to be not only moved but also heated. The audited contract facilities KARCEM coordinates recover process water. This lowers both the volume of fresh water drawn and the energy spent bringing that water back to process temperature — so water recovery is directly an energy lever and therefore a carbon lever. Within the same framework, ZDHC MRSL-compliant chemical management and automated dosing reduce the burden of unnecessary chemicals and rework.

3. Renewable energy: a cleaner power mix

Doing the same process with cleaner electricity directly lowers that process's carbon intensity. The audited contract facilities KARCEM coordinates draw on a renewable-energy share in their power mix. This is a lever that reduces the carbon load of energy-intensive steps — from dye vats to stenter machines — without reducing production volume.

4. ZLD roadmap: from a discharge target to zero

The logical endpoint of water recovery is zero liquid discharge (ZLD — Zero Liquid Discharge). KARCEM pursues this as a roadmap: gradually reducing wastewater discharge and approaching zero as the ultimate target. Keeping water in the system delivers gains on the water, chemical and carbon side at the same time, because it reduces both fresh-water intake and the treatment and reheating burden.

5. Sustainable fibre choice: starting the impact at the raw material

A significant part of a fabric's environmental impact is determined in the fibre itself, before it ever enters the factory. That is why KARCEM keeps low-impact fibre options in its portfolio: TENCEL™ and LENZING™ Modal, known for closed-loop production, more responsibly produced ECOVERO™ viscose, organic cotton and recycled polyester. Because recycled polyester reduces the demand for new raw material compared with virgin petroleum-based polyester, verifying the content claim with RCS becomes critical at this point — the claim is a real lever only when it is backed by a document chain.

Certificate + measured process = verifiable reduction

In short, two layers work together. GOTS and RCS answer the question "what did we use and where did it come from?" in an auditable way; they give independent proof of content and process responsibility. A coordinated, geographically close contract network, water recovery, renewable energy, the ZLD roadmap and fibre choice tie the question "how much energy and water did we spend producing it?" to concrete metrics. What cuts the carbon footprint is the intersection of these two — not the label, but the measured process behind the label.

That is why what is shared here are auditable process levers rather than unverifiable numbers: process-water recovery and a renewable-energy share at the audited contract facilities KARCEM coordinates, ZDHC MRSL compliance and the ZLD roadmap. Rather than giving a single absolute carbon figure for a single site, we prefer to show the levers that reduce impact; because a number that cannot be audited is worth less than a process that is audited.

With KARCEM

We knit greige in-house and coordinate dyeing, printing and finishing through our vetted contract network under a single point of contact; sustainable fibres and certified content meet a ΔE<1 colour tolerance verified on the incoming lot. In the sample → approval → production flow, we can determine together which certified fabric suits your project. For the full list of our certifications see the Certifications page, and for measured sustainability data see the Sustainability page. Get in touch for a quote or sample request.