The Digital Product Passport Is Coming. Is Your Dyeing Process Ready?

The fashion industry is no stranger to sustainability pledges. But a new EU regulation is about to raise the bar significantly, not by asking brands to make better claims, but by requiring them to prove every single one.

The Digital Product Passport (DPP), introduced under the EU’s Ecodesign for Sustainable Products Regulation (ESPR, Regulation EU 2024/1781), is set to become one of the most consequential compliance requirements the textile industry has faced. Every garment sold in Europe will eventually carry a scannable digital record: a permanent, verifiable account of what the product is made of, how it was processed, what resources it consumed, and what chemicals were used in its production.

Textiles are a priority product group. The delegated act defining the exact requirements is expected around 2027, with enforcement likely to follow from 2028. Brands that start preparing today will hold a structural advantage over those that wait.

And one of the first places to look is the dyehouse.

What Is the Digital Product Passport?

The DPP is a unique digital identity assigned to each product, usually accessed through a QR code on the label, that links to a structured database of product lifecycle information. It is not a label or a marketing claim. It is a legal compliance instrument designed to make sustainability data transparent, standardized, and verifiable across the EU market.

ESPR is a framework regulation. The DPP system is already law, in force since July 2024, but the specific data fields for each product category are set through separate delegated acts. For textiles and apparel, that delegated act is being developed now, and research from the European Parliamentary Research Service (EPRS) and the European Commission’s ongoing textile preparatory study already gives a strong indication of what it will require.

The data will be organized across multiple access tiers. Some of it will be visible to consumers, and some will be available only to regulators and business buyers. Importantly, declarations on their own will not be enough. The emerging requirement is for traceable, auditable evidence of how and where materials were processed, not just supplier assurances.

Why Dyeing Is the Highest-Stakes Step in DPP Compliance

Of all the stages in textile manufacturing, dyeing and finishing sit right at the epicenter of DPP scrutiny, and for good reason.

Dyeing and finishing account for an estimated 36% of the entire textile supply chain’s climate impact, according to the UN Environment Programme. A single kilogram of fabric can need anywhere from 50 to 200 liters of water to dye and finish, generating wastewater laden with synthetic dyes, heavy metals, salt, and chemical auxiliaries. Textile dyeing and treatment is responsible for roughly 20% of global industrial water pollution.

The DPP will make all this visible. For every garment sold in the EU, brands will need to document and disclose the environmental performance of their dyeing process, covering water consumption, energy use, carbon footprint, chemical inputs, and compliance with chemical safety rules. Under ESPR and the related due diligence rules, that data will need to be specific, process-level, and verifiable.

This is where SUPRAUNO® changes the equation.

The Six DPP Pillars Where SUPRAUNO® Gives Brands a Clear Advantage

1. Water Consumption Disclosure

What the DPP requires: Water intensity per unit of production is a core environmental metric expected in the textiles delegated act. The EU’s Apparel and Footwear Product Environmental Footprint Category Rules (PEFCR) treat water use as a critical lifecycle indicator alongside carbon.

The conventional problem: Traditional soft-flow dyeing uses between 50 and 200 liters of water per kilogram of fabric, water that then has to be treated at considerable cost before discharge.

The SUPRAUNO® advantage: SUPRAUNO® uses supercritical CO₂ as the dyeing medium in place of water. In testing on polyester-cotton blended fabrics, it delivered 76% water savings compared with conventional soft-flow dyeing. When brands populate their DPP with data from SUPRAUNO®-dyed fabric, they can report water-intensity figures that represent a step change rather than a marginal improvement.

2. Chemical Use and REACH Compliance

What the DPP requires: Full disclosure of the dyes and chemical substances used in dyeing and finishing, including REACH compliance. That covers mandatory verification of restricted azo dyes and Substances of Very High Concern (SVHCs). The data will be auditable, not self-reported.

The conventional problem: Conventional dyeing leans heavily on auxiliaries: dispersants, leveling agents, fixing agents, reduction-clearing chemicals, and salts. Many of these carry REACH compliance risk. Salt alone, used in huge quantities for reactive cotton dyeing, is a significant disposal challenge.

The SUPRAUNO® advantage: SUPRAUNO® achieves a 90% reduction in auxiliary chemicals compared with conventional soft-flow dyeing. No salt for cotton, no reduction clearing for polyester, and dyeing of blends in a single step. It uses conventional, commercially available dyes and standard trichrome recipes, which keeps chemical disclosure straightforward. Where conventional dyeing creates a complex disclosure burden, SUPRAUNO® simplifies the picture considerably.

3. Carbon Footprint and GHG Emissions

What the DPP requires: A product-level carbon footprint, calculated in line with the EU’s Product Environmental Footprint methodology, is expected to be a mandatory DPP data field. Process-level emissions across the supply chain will need to be evidenced.

The conventional problem: Dyeing and finishing is energy intensive. Heating large volumes of water, holding process temperatures, and running auxiliary systems all add up. Brands currently struggle to get credible process-level carbon data from their supply chain partners.

The SUPRAUNO® advantage: SUPRAUNO® uses 67% less energy than conventional dyeing. With no water to heat, treat, or pump in large volumes, much of that load disappears. The CO₂ runs in a closed loop, with roughly 95% of the gas recycled, so the carbon cost of the medium itself stays low. Moreover, the CO₂ used for dyeing is procured from industries wherein CO₂ is a by-product, and hence there is no additional CO₂ that’s let out into the atmosphere during the dyeing process. Studies indicate a carbon footprint reduction of around 40% compared with conventional dyeing. These are figures brands can document, evidence, and publish with confidence in their DPP.

4. Supply Chain Traceability and Process-Level Documentation

What the DPP requires: Multi-tier supply chain visibility, from Tier-1 garment manufacture through Tier-2 dyeing and finishing to Tier-3 raw material processing. Brands will need auditable evidence of where and how materials were processed, and dyeing and finishing is specifically flagged as a high-risk upstream node.

The conventional problem: Dyeing is often one of the least transparent steps in a textile supply chain. Multiple chemical inputs, variable batch processes, and inconsistent supplier data make it hard for brands to produce the granular, verifiable process data a DPP demands.

The SUPRAUNO® advantage: SUPRAUNO®’s closed-loop CO₂ system produces consistent, measurable outputs for every batch: energy consumed, CO₂ recycled, water used, chemicals applied. That consistency is a real asset when you are building the Tier-2 documentation that DPP compliance calls for. Brands working with SUPRAUNO®-equipped dyehouses start with a natural foundation for traceable, auditable supply chain data.

5. Hazardous Substance Elimination and Worker Safety

What the DPP requires: Information on hazardous chemicals across the supply chain, linked to REACH enforcement, will be a key DPP data category for authorities. The passport is also expected to carry information that supports safe handling, worker safety, and end-of-life processing.

The conventional problem: The chemical complexity of conventional dyeing creates real worker-safety exposure. Dyehouse staff handle a wide range of auxiliaries, many with occupational health risks, and wastewater treatment adds another layer of chemical handling.

The SUPRAUNO® advantage: By replacing aqueous chemistry with supercritical CO₂, SUPRAUNO® reduces most hazardous chemical handling at the dyehouse by 90%. No salt, no reduction-clearing chemicals, minimal auxiliaries, and minimal wastewater discharge. When brands report worker-safety conditions through their DPP, a SUPRAUNO® supply chain offers a cleaner story to tell.

6. Circularity, Recyclability, and End-of-Life Data

What the DPP requires: The DPP will include circularity and end-of-life information: recycling instructions, recyclability scores, and data that supports safe material recovery. ESPR explicitly encourages production methods that support the circular economy.

The conventional problem: Chemically intensive dyeing can complicate downstream recycling. Heavy salt loading, residual auxiliaries, and wastewater treatment by-products can lower fabric recyclability and interfere with chemical recycling processes that need clean input materials.

The SUPRAUNO® advantage: Because SUPRAUNO® removes the bulk of chemical auxiliaries and needs no salt or reduction-clearing chemistry, fabrics go into the end-of-life stage with a cleaner chemical profile. As chemical textile recycling scales up, and those processes need contaminant-free input fibers, SUPRAUNO®-dyed fabrics are better placed to meet recyclability standards. It is a forward-looking advantage that will matter more as DPP recyclability scoring matures.

Beyond Compliance: DPP as a Brand Differentiator

The DPP is a compliance requirement. But for brands that are well ahead, it is also a marketing instrument.

When a customer scans the QR code on a SUPRAUNO®-dyed garment, they see numbers most garments cannot match: a water intensity that is a fraction of the industry norm, a chemical footprint cut by close to an order of magnitude, and a carbon figure that reflects a far more efficient process.

Early movers are already finding that the passport creates a first-party customer engagement channel and a credible, scannable proof point for sustainability claims at the moment of purchase. For brands that are investing in sustainability and want those investments to be visible and verifiable, SUPRAUNO® supplies the underlying data that turns a compliance obligation into a competitive advantage.

The Greenwashing Cliff

There is a less comfortable side to DPP readiness that is worth naming directly.

The DPP is designed precisely to end the era of unverifiable sustainability claims. The EU’s wider architecture, ESPR together with the existing Unfair Commercial Practices Directive and growing enforcement pressure on misleading environmental claims, means brands making dyeing-related sustainability statements will increasingly need auditable process data to back them.

Brands that have built water-reduction or chemical-reduction claims on estimates, targets, or supplier self-reporting face real risk as DPP documentation requirements firm up. Brands using SUPRAUNO® are in a different position: their claims rest on a patented process with documented performance metrics, tested on commercial-scale equipment and validated in real production trials.

In a market where “verified” increasingly beats “claimed,” that distinction matters a great deal.

Where to Start

DPP enforcement for textiles is expected to begin around 2028, but the data infrastructure (supplier relationships, measurement systems, process documentation) needs to be built now. The delegated act requirements are likely to be finalized around 2027, which leaves a tight window for implementation.

For brands and manufacturers getting ready:

• Audit your Tier-2 dyeing and finishing processes. The most demanding DPP data sits here: water, energy, chemicals, carbon.

• Prioritize verifiable data. DPP compliance asks for process-level evidence, not estimates or industry averages.

• Partner with dyehouses that run measurable, documented technology. SUPRAUNO®’s process generates the kind of consistent, repeatable data DPP compliance needs.

• Think beyond compliance. The brands that get the most from DPP treat it as a product story, not just a regulatory burden.

Conclusion

The Digital Product Passport does not reward intention. It rewards performance: the kind of measurable, documentable, process-level environmental performance that has always been hard to claim and harder to prove.

SUPRAUNO® is not a compliance tool. It is a better dyeing technology that happens to produce exactly the environmental profile, across water, energy, chemicals, carbon, and circularity, that the DPP is built to surface. For brands serious about sustainability leadership, the fit is not a coincidence. It is built in.

The passport is coming. The data will be public. The real question for every brand is whether its dyeing process is ready to be seen.

SUPRAUNO® 101: How SUPRAUNO® Waterless Dyeing Works

Introduction

Textile dyeing is more than just an industrial process; it is one of the biggest hidden sources of environmental damage in global manufacturing. In major textile hubs, rivers often run visibly colored from untreated effluents, groundwater becomes unsafe for drinking, and nearby communities face long-term health risks due to chemical discharges.

The problem is structural. Conventional dyeing uses about 100 to 150 liters of water per kilogram of fabric, much of which leaves the system contaminated with salts, unfixed dyes, and processing chemicals. Globally, textile processing accounts for nearly 20 percent of industrial wastewater, making it a major contributor to water pollution. This isn’t a problem caused by poor optimization, but by the way dyeing has been designed. SUPRAUNO® starts with a different approach. If we embed the environmental cost into the process, then we must redesign the process itself.

The Problem with Water-Based Dyeing

Conventional dyeing operates as an aqueous mass transfer process where dyes are dissolved in water and transported into fibers through diffusion. Temperature and auxiliary chemicals drive this interaction, but the system is fundamentally dependent on moving dye through a bulk liquid medium.

This creates inherent inefficiencies. In most dyeing processes, only 60 to 70 percent of the dye actually fixes onto the fiber, with the rest lost during washing and post-treatment. To compensate, large quantities of salts and chemicals are introduced, in some cases reaching 50 to 100 percent of the fabric weight. The resulting wastewater contains high levels of chemical oxygen demand and dissolved solids, requiring complex treatment infrastructure.

The process is also operationally intensive. Multiple steps, including pre-treatment, dyeing, rinsing, and finishing, extend cycle times to 6 to 8 hours or more. Each step adds energy consumption, process variability, and cost.

Limitations of Prior-Art Supercritical CO₂ Dyeing

Supercritical CO₂ dyeing in earlier technologies was introduced as an alternative to eliminate water from the process. In its supercritical state, CO₂ behaves as a high-density fluid that combines characteristics of both liquids and gases. It can solubilize compounds like a liquid while flowing like a gas, which results in low viscosity, high diffusivity, and strong penetration into textile structures.

However, the chemistry of the system imposes clear limitations. CO₂ is non-polar, while most textile dyes are designed to dissolve in polar solvents such as water. This mismatch leads to inherently low dye solubility in supercritical CO₂, often several orders of magnitude lower than in aqueous systems. As a result, the amount of dye that can be transported is limited, and mass transfer becomes slow and constrained.

The process also faces physical transport challenges. In a dyeing vessel containing multiple layers of fabric, dye must travel through the CO₂ phase and then diffuse into each layer. This creates concentration gradients within the vessel, where dye availability varies across different regions of the fabric stack. Flow dynamics further complicate the system, leading to issues such as uneven dyeing and inconsistent shade development.

These systems are also limited in scope. They are primarily effective for hydrophobic fibers such as polyester and often require specially engineered dyes to improve compatibility with CO₂. Shade control depends heavily on exposure time and flow conditions, making reproducibility and scale-up difficult.

In effect, earlier supercritical CO₂ technologies improved the solvent but did not eliminate the solvent's dependence on transporting dye.

How SUPRAUNO® Overcomes These Limitations

SUPRAUNO® changes the fundamental mechanism of dye transfer. Instead of relying on the fluid medium to carry dye to the textile, it begins by placing the dye directly onto the fabric surface through controlled pre-coating processes such as padding, spraying, or printing. This ensures uniform distribution of dye before the dyeing process begins.

The pre-coated fabric is then placed in a high-pressure system and exposed to pure supercritical CO₂ under controlled conditions.

Within this environment, CO₂ acts locally rather than as a bulk carrier. It interacts with the dye present on the fiber surface, solubilizes it in situ, and drives diffusion into the fiber matrix. Because the dye is already evenly distributed, the process avoids transport bottlenecks and eliminates concentration gradients within the vessel.

This approach leads to measurable improvements. The process achieves approximately 90 percent reduction in auxiliary chemicals, 76 percent reduction in water usage, and 67 percent lower energy consumption, while reducing batch cycle times to 1.5 to 2 hours. The system operates in a closed loop where about 95 percent of CO₂ is continuously recycled, effectively eliminating wastewater discharge.

Importantly, SUPRAUNO® maintains compatibility with conventional dyes and standard color recipes. It works across a wide range of fibers, including cotton, polyester, viscose, nylon, acrylic, linen, wool, silk, and blends, enabling capabilities such as single-step blend dyeing that are difficult to achieve in traditional systems.

Proof in Production

SUPRAUNO® is not a theoretical concept. It has already been implemented at commercial and pilot scales with leading industry players.

At Arvind Ltd., one of India’s largest textile manufacturers, in association with H&M Group, SUPRAUNO® has been deployed at commercial scale, demonstrating real-world feasibility in an industrial environment. The system has validated key performance metrics, including reduced resource consumption, consistent dyeing quality, and improved operational efficiency. Over the past 4 years, we have carried out over 2500+ dyeing trials on our Mumbai facility SUPRAUNO® prototype plant for 50+ brands and mills around the globe. A semi-commercial scale SUPRAUNO® plant enabling brands and mills to carry out full-width dyeing trials would be set up at BTRA (Bombay Textile Research Association) in 2026. Together, these deployments bridge the gap between innovation and adoption, showing that SUPRAUNO® can operate not just in controlled settings, but within the realities of global textile manufacturing.

A New Paradigm in Textile Dyeing

What distinguishes SUPRAUNO® is not just its performance metrics, but the shift in process architecture it represents. Traditional dyeing systems are built around solvent-driven transport, where the medium dictates how dye reaches the fiber. SUPRAUNO replaces this with a surface-engineered, diffusion-driven mechanism where interaction occurs directly at the fiber level.

The implications extend beyond sustainability. A process that once required hundreds of liters of water per kilogram of fabric can now operate with minimal water input. Multi-step workflows are condensed into a single integrated process, improving throughput and reducing complexity. Enhanced dye utilization and consistency translate into stronger unit economics at scale.

SUPRAUNO is not an incremental improvement. It is a redefinition of how dyeing works, built for a future where efficiency, scalability, and sustainability are no longer optional, but essential.