Bio-Based Black Has a Credibility Problem. Here's How to Navigate It.
By Jane Palmer, CEO, Nature Coatings
Summary: The bio-based materials market is maturing fast — and not always in the right direction. As more suppliers enter the black pigment category with bio-based claims, buyers face a new and under-appreciated risk: that "bio-based" becomes the next "natural." Here's what that means, and what to do about it.
In the early years of the sustainability and health movements, "natural" carried a genuine signal. It meant something had been removed from a formulation, a sourcing decision had been made deliberately, a tradeoff had been accepted in the name of ingredient integrity. Then the market caught up. "Natural" became a font choice. A color palette. A PR strategy. By the time regulators and journalists started asking what it actually meant, the word had already been stretched past the point of recovery. It means almost nothing now on a product label — and the brands that built equity on it have spent the last several years quietly finding more defensible ground.
Now, I’m watching the same thing happen to “bio-based” as several major chemical companies use that label to launch their own products.
Bio-based is only a credible substitute for petroleum if the biomass behind it is responsibly sourced, rigorously tested, and independently verified. It is not, by definition, any of those things. "Bio-based" describes a feedstock origin. It says nothing about whether that feedstock was harvested sustainably. It says nothing about what happened to it during manufacturing. It says nothing about whether the finished material contains PAHs, nanomaterials, or VOCs — all of which can survive a bio-based production process if the process isn't designed to exclude them from the start.
As the black pigment category attracts new entrants making bio-based claims,the cost of a bad qualification decision is compounding. A brand that adopts a bio-based black without adequate documentation isn't just exposed to performance risk — it's exposed to the reputational and regulatory consequences of a sustainability claim that doesn't survive scrutiny. In 2026, withCSRD, REACH restrictions, and retailer clean standards all enforceable rather than aspirational, that exposure is material.
The Questions That Sort Signal From Noise
When we talk to procurement leads, sustainability directors, and formulation teams who are evaluating bio-based black pigments — whether they're evaluating BioBlack or something else — we encourage them to ask the same five questions of every supplier. The answers will tell them almost everything.
Has the finished pigment been independently tested for PAHs, nanomaterials, and VOCs? A bio-based feedstock does not guarantee a non-toxic finished product.Carbon black's toxicological profile — PAHs, nanoscale particles, VOC residuals — comes from the combustion process, not exclusively from the petroleum origin. Any thermal conversion process can produce similar byproducts if it isn't specifically designed to prevent them. Ask for the test reports, not the spec sheet. The spec sheet is what the supplier wants you to see. The test reports are what the auditor will ask for.
What is the cradle-to-gate carbon footprint per kilogram, and is it third-party verified?Emissions data that isn't ISO 14040/14044/14067 aligned and independently audited isn't emissions data — it's an estimate. "Carbon negative" as a headline claim is meaningful only when there's a peer-reviewed LCA behind it that a CDP submission or CSRD disclosure can point to. Ask for the methodology, the system boundary, the third-party auditor, and the publication date. An LCA conducted five years ago on a different production process is not the same as a current, verified number.
Is the chain of custody documented per lot, or only at the mill level? A certified source mill is necessary but not sufficient.The paper trail from mill to your warehouse — lot by lot, with documentation that can be pulled for any individual batch — is what holds up when a retailer, a regulator, or a brand's own sustainability team asks to trace an ingredient. Lot-level traceability is a different operational capability than having a certified supplier. Ask which one you're actually getting.
How long has the pigment been in commercial production, and across which applications? This is the question that gets asked least and matters most for supply continuity.A bio-based supplier that ran out of feedstock the moment a SKU went viral is a failure mode the beauty and apparel industries have already experienced. Qualification history — years in commercial production, volume shipped, applications qualified, documented lot-to-lot consistency — is supply chain risk management. A pigment that has been running in production since 2017 across cosmetics, textiles, asphalt, and industrial applications is a different risk profile than one with a pilot run and a compelling deck.
What Rigorous Looks Like
I'll be direct: BioBlack was built to answer all five of these questions without hesitation, because we believed from the beginning that the credibility of bio-based as a category depends on every supplier in it being held to that standard. If bio-based becomes the next "natural" — a claim that sounds good and proves nothing — the entire shift away from petroleum-derived pigments loses its momentum. That outcome is bad for every brand, every manufacturer, and every supplier in this space, including us.
If you're working through a qualification right now, we're happy to walk you through how BioBlack answers each question — with the certificate numbers, the test reports, the LCA methodology, and the lot-level traceability documentation in hand. Ask us anything. That's how this is supposed to work.