PPWR Printing Inks: Substances, Migration & Deinkability

PPWR & Printing Inks and Coatings: The Converter's Ink-Room Playbook for Substances of Concern, Deinkability and Low-Migration

Ink is the thinnest layer on a pack and the one regulators scrutinise hardest. A few microns of varnish or a single non-deinkable pigment can pull an otherwise grade-A construction down a band, trigger a food-contact migration failure, or void a Declaration of Conformity. Under Regulation (EU) 2025/40 the ink room — flexo, offset, gravure, screen, UV, water-based and digital alike — moves from a colour-management function to a compliance-critical one. This is the printer-side and converter-side playbook for getting inks, varnishes and coatings through the August 12, 2026 deadline.

The reader here is the print buyer, the prepress lead, the ink technologist and the compliance owner at a packaging, label or carton converter — not only the brand owner. PPWR places the recyclability grade, the restricted-substance check and the DoC squarely on the economic operator that places the packaging on the market, and brand owners are pushing that evidence burden straight back up the supply chain to the press that applied the ink.

What the Regulation Actually Says About Inks

PPWR never uses the word "ink" as a standalone control, but four articles converge on the ink layer. Article 5 and Annex V restrict substances of concern, including the sum of lead, cadmium, mercury and hexavalent chromium below 100 mg/kg — a limit in force since January 1, 2026 that hits classic pigment chemistries (lead chromate yellows, cadmium oranges and reds, certain effect pigments). Article 6 and Annex IIrequire every construction to carry a design-for-recycling grade (A to E), and the ink's deinkability and pigment opacity feed directly into that grade. Article 7 sets recycled-content targets that ink residues can sabotage by contaminating the recyclate stream. Article 39 and Annex VIII require a Declaration of Conformity per packaging unit, and the ink and coating bill of materials is part of the evidence pack.

Layer on top the PFAS restriction that applies to food-contact packaging from August 12, 2026, the harmonised labelling under Article 12 (pictograms and material codes from August 12, 2028, which must themselves be printed legibly and durably), and the grade thresholds — grades D and E banned from January 1, 2030, only grades A and B permitted from January 1, 2038 — and the ink room becomes a recurring line item in every compliance review.

The Ink-and-Coating Obligation Stack

The Substances of Concern Hiding in the Ink Room

PPWR's Article 5 obligation to minimise substances of concern is broader than the heavy-metal sum. For a printer it resolves into three recurring problem families, each of which needs a documented remediation path before a DoC can be signed.

Mineral Oil (MOSH/MOAH) in Sheet-Fed and Web Inks

Conventional sheet-fed offset and cold-set news inks are built on mineral-oil distillates, and the saturated and aromatic hydrocarbon fractions (MOSH/MOAH) migrate through paper and board into dry foods. PPWR does not set a numeric MOSH/MOAH limit, but Article 5 and the German LFGB 28th Recommendation plus the Swiss Ordinance RS 817.023.21 effectively force converters of food-contact cartons and bags either to switch to mineral-oil-free vegetable- or bio-based inks, or to specify a functional barrier. The practical converter move is to qualify mineral-oil-free offset and to keep recovered-fibre inks out of any direct food-contact face.

Photoinitiators and the Low-Migration UV Question

UV and LED-UV curing deliver durability and instant set-off, but uncured or partially reacted photoinitiators are classic migrants. Substances such as ITX, benzophenone and amine synergists have a long history of food-contact recalls. For any pack with a food-contact or contact-sensitive application, the converter must specify low-migration ink series, validate cure (using the EuPIA-recommended methods), and hold a migration test report against the relevant food simulant. Switching to low-migration LED-UV is now the default for food and pharma label work, and the photoinitiator list belongs in the Annex VIII evidence pack.

PFAS, Slip Additives and Anti-Set-Off Powders

PFAS rarely enters as a deliberate ink ingredient, but fluorinated slip and levelling additives, some matte varnishes and certain release coatings have historically carried it. The EuPIA Information Note on PFAS and Printing Inks (April 2026) confirms that compliant ink systems do not rely on intentionally-added PFAS, and that the 50 ppm total-fluorine screening threshold is not breached by trace, non-functional fluorine. Converters serving food-contact markets must collect PFAS-free declarations for every ink, varnish and additive and archive them against the August 12, 2026 deadline.

Deinkability: How the Ink Decides the Annex II Grade

For fibre-based packaging, the ink is one of the few converter-controlled variables that moves the Annex II grade. The recyclability test (CEPI for paper and board, with the 4evergreen design-for-recyclability protocol layered on top) measures whether the ink releases cleanly in the deinking loop or stays bound to the fibre as residual colour and stickies. INGEDE Method 11 quantifies deinkability; Method 12 quantifies stickies and repulpability. The ink-side levers are well understood: water-based and conventional offset inks generally deink well; full-area UV varnish, cationic UV, liquid toner and heavily pigmented opaque whites are the recurring grade-killers. The converter's job is to cap coverage of non-deinkable systems and to qualify repulpable UV and dispersion-varnish alternatives reference by reference.

On plastic substrates the equivalent risk is wash-resistance in the wrong direction: inks that bleed during the caustic wash contaminate the recyclate and depress the rPET or rPE quality that Article 7 recycled-content targets depend on. RecyClass design-for-recycling protocols flag the offending chemistries, and de-inkable or alkali-releasable surface prints are the compliant route for shrink sleeves and direct-print containers.

Food-Contact Inks: GMP, the EuPIA Charter and NIAS

Inks for food-contact materials sit under a self-standing governance layer that PPWR now reinforces. The 5th edition of the EuPIA Good Manufacturing Practice for printing inks applied to food-contact materials applies from January 1, 2026, and the 2026 EuPIA Charter replaces the long-running Exclusion Policy as the positive-listing and exclusion framework for raw-material selection. Non-intentionally-added substances (NIAS) — impurities and reaction products that are not on any recipe — must be identified and risk-assessed, because they are the substances most likely to surface in a migration test the converter did not anticipate. The compliant converter holds, per food-contact SKU, a statement of composition, a migration test report against the correct simulant, a GMP declaration and an exclusion-policy/Charter conformity statement from the ink supplier.

Action Plan for Printers and Converters

• Build an ink-and-coating register — one row per ink, varnish, primer and additive in active use, mapped to its supplier declaration, CAS list, heavy-metal status and PFAS-free statement. This is the spine of every DoC.
• Purge restricted pigments now — Annex V heavy-metal limits are already in force; remove lead chromate, cadmium and chromate-passivated effect pigments and document the substitution.
• Qualify mineral-oil-free and low-migration series — switch food-contact offset to mineral-oil-free, default food and pharma labels to low-migration LED-UV, and hold migration test reports per simulant.
• Test deinkability per reference — book INGEDE Method 11 and Method 12 for fibre constructions; cap full-area UV varnish and opaque coverage that pushes the Annex II grade below C.
• Protect the recyclate stream — specify wash-resistant or alkali-releasable inks on plastic substrates so surface print does not depress rPET/rPE quality and undercut Article 7 targets.
• Collect GMP and Charter declarations — for every food-contact ink, archive the EuPIA GMP statement, the 2026 Charter conformity statement and a NIAS risk assessment.
• Make the data machine-readable — publish the ink bill of materials and test reports as a structured export per SKU, not a scanned PDF, so brand-owner procurement can fold it straight into their Annex VIII DoC.

How PPWR Connect Helps Printers and Converters

Inks and coatings are where PPWR Articles 5, 6, 7, 12 and 39 all land on the same few microns — and where the converter's choice of pigment, photoinitiator, varnish and primer directly decides the recyclability grade, the migration result and the validity of the Declaration of Conformity. PPWR Connect gives packaging, label and carton printers a single place to inventory every ink, varnish and additive, link each to its supplier and Charter/GMP declaration, run Annex II grading on the full substrate-plus-ink stack, store INGEDE and migration test reports, track PFAS and heavy-metal status, and generate audit-ready Declarations of Conformity per market — then publish the same structured component data back to brand-owner customers. With August 12, 2026 close at hand, the converters that get their ink-room data in order now are the ones that keep signing DoCs without re-testing every reference under deadline pressure.