Bio-based printing inks

01Overview and value chain#

Markers EC: EU PPWR recyclability criteria + REACH and the Swiss Ordinance on food-contact inks + US FDA indirect food-additive limits + Japan Biomass Mark | OECD: Bio-materials, Circular bioeconomy | Regulator: FDA (USA), ECHA/REACH (EU), NEA (China)

A printing ink is a pigment dispersed in a binder system, and it is the binder — historically a mineral-oil or petrochemical resin — that decides whether the ink is fossil or renewable. Bio-based inks replace that carrier with vegetable oils (soy, linseed, rapeseed), rosin and other tree-derived resins, and increasingly bio-based acrylates for UV-curable systems, while keeping press performance, colour strength and drying behaviour intact. This article covers the ink manufacturers and is bounded against three siblings that own the neighbouring coatings. Bio-glues, bio-lacquers and biopolymer coatings owns adhesives and edible food coatings — despite carrying “bio-lacquers” in its title, its subject is soy and lignin adhesives, bioepoxies and chitosan produce films, and it tables Sika, Guangdong Huitian, Apeel and Entropy Resins. Antifouling bio-coatings for marine owns marine hull coatings and tables AkzoNobel. Bio-based polyols and biopolyurethanes owns the polyurethane resin chemistry and tables Covestro. None of them tables an ink maker, and none of the four firms here appears in any of them.

The key directions of bio-based printing inks are:

1. Vegetable-oil offset inks (Vegetable Oil Binders): soy, linseed and rapeseed oils replace mineral oil as the offset vehicle, the oldest and highest-volume renewable route, now sold against certified plant-content thresholds rather than as a generic “soy ink” claim.
2. Bio-renewable packaging inks (Biorenewable Packaging Inks): solvent- and water-based flexo and gravure inks for film and board where the resin is derived from renewable carbon — the segment Flint Group addresses with FlexiStar BRC and TerraCode Bio.
3. Renewable UV-curable systems (Renewable UV Curing): UV-flexo and UV-offset inks built on bio-based acrylate oligomers, the hardest slice technically because cure speed and adhesion are set by the oligomer backbone — Flint Group’s BioCure F sits here.
4. Certified plant-content branding (Biomass Certification): third-party marks that turn a bio-content claim into an auditable one — Japan’s Biomass Mark and Rice Ink Mark behind Sakata INX’s BOTANICAL INK, which declares 10% or more plant-derived components in the ink solid.

Sectoral value chain#

[renewable feedstock] ──> [binder / resin] ──> [ink formulation]
                                                     │
                          (vegetable oil, rosin, bio-acrylate -> vehicle)
                                                     │
                                                     ▼
[recycling & deinking] <── [printing & curing] <── [certification]

Value chain levels#

Cross-cutting technologies of the sector:

• Vegetable-oil vehicles (Bio Binder Chemistry): oil selection and alkyd modification set tack, misting and set-off; the constraint is that a renewable vehicle must match mineral-oil press behaviour, not merely exist.
• Bio-based acrylate oligomers (Renewable UV Curing): the backbone determines cure speed, adhesion and migration, which is why the UV segment lagged the offset one by decades.
• Deinkability and food-contact compliance (Regulatory Performance): an ink enters packaging only if it clears migration limits and does not spoil the recycling stream — under PPWR these are becoming the binding criteria rather than the bio-content number.

02US#

The United States hosts the largest ink groups and the original soy-ink programme, and its regulatory pressure comes through food-contact rules rather than a bio-content mandate.

Sun Chemical, soy heritage, FDA indirect additives#

• Sun Chemical is the largest of the firms tabled here and sells bio-renewable and sustainable packaging ink ranges across its portfolio, with the renewable-content story presented alongside deinkability and recyclability rather than on its own.
• The soy-ink programme is the ancestor of the category. Vegetable-oil offset inks were commercialised in the United States as a newsprint substitution for mineral oil, which is why “soy ink” persists as a generic term even where the modern claim is a certified percentage of renewable carbon.
• FDA indirect food-additive limits are the gate for packaging. An ink for food packaging is regulated through migration into the food rather than through its feedstock, so a bio-based ink earns no regulatory relief for being bio-based — it must clear the same barrier as a fossil one.

03CN#

China is the volume centre of ink manufacture and of soy-ink discussion, but the bio-based segment is served by the global majors’ local operations rather than by a domestic bio-ink specialist.

Soy-ink adoption, converter demand, no domestic bio-ink major#

• Soy and vegetable-oil inks are well documented in the Chinese trade literature as the environmentally preferable option for offset printing, and the terminology (大豆油墨, “soybean oil ink”) is established in industry reference material and standards discussion.
• The domestic supply that surfaces is directory-grade. Screening for Chinese bio-based ink producers returns encyclopedia and training material, patent filings on soy-ink preparation, and small suppliers listed only on B2B platforms — alongside printing houses that use soy ink rather than manufacture it. No Chinese producer with a bio-based ink product line on its own domain was confirmed in this screen.
• Demand comes through packaging converters. The pull is export packaging and brand-owner specifications, which is why the global ink majors serve the segment through their Chinese operations rather than ceding it to a local bio-specialist.

04EU#

Europe sets the regulatory pace through packaging recyclability and food-contact rules, and hosts three of the four producers tabled here.

Siegwerk, Flint Group, PPWR and deinking#

• Siegwerk (Germany) sells bio-based and renewable-content packaging inks and pairs the claim with deinking and recyclability performance — the combination European converters actually buy, since an ink that carries renewable carbon but spoils the recycling stream fails the newer packaging criteria.
• Flint Group (Luxembourg) is the clearest brand-level case: FlexiStar BRC is a solvent-based biorenewable packaging ink range, TerraCode Bio a flexo ink line for paper and board, and BioCure F a UV-flexo renewable ink system — three named products across three different chemistries rather than one marketing claim.
• PPWR is turning recyclability into the binding constraint. The EU Packaging and Packaging Waste Regulation’s design-for-recycling criteria, together with REACH and the Swiss Ordinance on food-contact inks, mean an ink’s route to market runs through deinkability and migration testing; renewable content is a differentiator layered on top, not a substitute.

05Leading companies and research institutes#

06Tech stack and innovations#

1. The binder is the whole question.
   • Pigment and additives are largely shared with fossil inks; substituting the vehicle — vegetable oil, rosin ester, bio-acrylate — is what makes an ink bio-based, and what risks press performance.
   • This is why bio-content is quoted against the ink solid rather than the wet ink: solvent and water carry no renewable carbon and would flatter the number.
2. UV curing was the hard slice.
   • Oxidative-drying offset inks accepted vegetable oils decades ago; UV systems needed bio-based acrylate oligomers whose backbone still delivers cure speed, adhesion and low migration.
   • Flint Group’s BioCure F is the tabled example of that route reaching a commercial UV-flexo system.
3. Certification converts a claim into an asset.
   • Japan’s Biomass Mark and the Rice Ink Mark give an auditable third-party threshold, which is why Sakata INX states a specific figure — 10% or more plant-derived content in the ink solid — rather than an unquantified “eco” claim.
   • Buyers increasingly ask for the certificate rather than the adjective.
4. Recyclability now outranks bio-content.
   • Under PPWR design-for-recycling criteria, deinkability and migration compliance decide whether a printed pack is sellable at all; renewable carbon differentiates between compliant options.
   • Siegwerk’s positioning — renewable content presented together with deinking performance — reflects that ordering.

07Value chains and production pipelines#

Industrial pipeline of a bio-based ink plant (PPWR / REACH / FDA / Biomass Mark)#

The sequence below is what every tabled producer runs; the differences between them are which renewable vehicle they master and which certifications they hold.

┌───────────────────────────┐      ┌───────────────────────────┐
│ 1. Renewable feedstock    │ ───> │ 2. Binder & resin         │
└───────────────────────────┘      └───────────────────────────┘
                                                  │
                                                  ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 4. Certification          │ <─── │ 3. Ink formulation        │
└───────────────────────────┘      └───────────────────────────┘
              │
              ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 5. Printing & curing      │ ───> │ 6. Recycling & deinking   │
└───────────────────────────┘      └───────────────────────────┘

Stage 1: Renewable feedstock

Vegetable oils, tall oil and rosin, and other forestry co-products are sourced to ink-grade specification; the output is bio-based oil and resin precursors.

Stage 2: Binder and resin

Those precursors are converted into varnishes, alkyds, rosin esters or bio-based acrylate oligomers; the output is a renewable ink vehicle.

Stage 3: Ink formulation

Pigment is dispersed into the vehicle with additives and milled to the target rheology for offset, flexo, gravure or UV application; the output is finished ink.

Stage 4: Certification

Renewable content is declared and audited against a third-party scheme — Biomass Mark, Rice Ink Mark or a mass-balance certificate; the output is an auditable renewable-content claim.

Stage 5: Printing and curing

The ink is applied on press to film, board or paper and dried by oxidation, evaporation or UV cure; the output is printed packaging or publication material.

Stage 6: Recycling and deinking

The printed matter enters repulping, where the ink’s deinkability decides fibre yield and brightness; the output is deinked fibre and a recyclable pack under PPWR criteria.