Ink Systems & Formulation — Regulatory & Compliance Guide

Ink Compliance Frameworks by Market: What the Standards Actually Require #

The EU, US, and China each approach ink regulation from a structurally different starting point, and that gap causes more specification misalignment than almost any other variable we handle on the print floor.

In the EU, food-contact ink compliance runs through Regulation (EC) No 10/2011 for plastic substrates and the Council of Europe Resolution AP(2005)2 for paper and board. Neither is a positive list for inks in isolation — compliance is built through a chain of declarations from ink supplier to converter to brand owner. We file a Declaration of Compliance (DoC) on every food-contact job, cross-referenced against our supplier’s formulation SDS and migration test data. The Swiss Ordinance SR 817.023.21, while technically Swiss law, is the closest thing the EU currently has to a harmonised ink positive list and is widely accepted by EU retailers as the reference standard.

In the US, the framework sits under FDA 21 CFR Part 176 for paper and paperboard in contact with food, and 21 CFR Part 175 for coatings. The US system is more permissive in the sense that functional barrier theory is accepted — if a non-compliant ink is shielded by a functional barrier achieving <10 ppb migration, it may be considered acceptable. In practice, we still specify low-migration (LM) ink systems for any direct or indirect food-contact brief, because retailer codes of practice (Walmart, Costco, Kroger) impose stricter requirements than the FDA baseline.

China’s standard GB 9685-2016 governs additive use in food-contact materials, and GB/T 7707-2008 covers intaglio printed matter. For export-oriented production at our facility, we apply the most restrictive of the three frameworks by default — typically EU requirements — unless the brand specifies otherwise in their purchase order and quality agreement.

The migration limit differential between EU (10 mg/dm²) and China general-surface (30 mg/dm²) is the figure that most frequently catches brands off guard when they’re launching simultaneously in both markets.

Where Compliance Failures Actually Originate #

The gap is rarely in the ink formulation itself. In our experience, failures trace back to three specific breakdowns in the documentation chain, not to a rogue pigment in the ink can.

The first and most common is photoinitiator carry-through in UV-cured offset or flexo systems. UV inks cure by radical polymerisation triggered by photoinitiators (PIs) such as benzophenone (BP) and isopropylthioxanthone (ITX). When cure energy is insufficient — we flag anything below 120 mJ/cm² for standard UV offset, and we log this under our QC-F14 cure verification record — unreacted PIs migrate through the substrate and into the product. Both BP and ITX are restricted under REACH SVHC list and are specifically flagged in EC 10/2011 Annex I. A job that passes internal QC but was run at 95 mJ/cm² due to a lamp degradation event can produce a batch with measurable ITX migration 4–6 weeks after delivery, once the product has been in contact with food packaging. We’ve had this scenario reported by clients before we implemented mandatory lamp output logging at the press.

The second failure mode is mineral oil migration from recycled fibre board. MOSH (mineral oil saturated hydrocarbons) and MOAH (mineral oil aromatic hydrocarbons) migrate from recycled cardboard into food through the gas phase — no direct contact required. This is governed by the German BfR Recommendation XXXVI and increasingly by the proposed EU MOSH/MOAH regulation that has been in draft for several cycles. If your brief calls for recycled-content board under FSC certification, we specify an inner barrier coating of at least 10 g/m² of an aluminium foil laminate or a functional barrier lacquer tested to <0.5 mg/kg migration before approving the substrate.

The third failure mode is incomplete DoC chains. An ink supplier may provide a compliant formulation but issue a DoC that references an outdated version of EC 10/2011 or omits the specific substrate and contact conditions. Retailers in Germany, the UK, and the Netherlands have rejected full shipments on this basis. Our sourcing team runs a quarterly review of all DoC documents from ink suppliers against current regulation versions — this is what we call our Supplier Compliance Gate, and it caught three outdated declarations in our last review cycle covering 14 active suppliers.

Does Ink Compliance Transfer Between Substrates? #

No — and this is where opinions genuinely differ among converters.

Some facilities treat a DoC issued for a paper substrate as broadly applicable to a board substrate from the same supplier family. Others requalify each substrate change independently. Our practice is to require substrate-specific migration testing whenever the base material changes by more than one grade category — for example, moving from a virgin fibre SBS board to a recycled GD2 board requires a new migration test series, even if the ink system is identical. The reasoning is straightforward: MOSH/MOAH contribution from the substrate itself changes the total migration picture. An ink that passes at 3.2 mg/dm² on SBS may show combined migration of 11.8 mg/dm² on GD2 due to substrate contribution, breaching the EU 10 mg/dm² limit. That outcome is the brand owner’s recall risk, not ours — which is why we build the test cost into the project quote rather than skip it.

For non-food packaging, the calculus changes. If you’re sourcing a rigid gift box with no food contact and no cosmetic product contact, a full EC 10/2011 DoC chain is not required, and we manage ink selection under REACH Regulation (EC) No 1907/2006 substance restriction alone.

Specification Notes for Brand Partners #

When you brief us on a print project requiring regulatory documentation, the first thing we need confirmed is the intended market and the contact category — direct food contact, indirect food contact, non-food cosmetic contact, or non-contact. These four categories produce four completely different documentation sets.

The gap we encounter most often is an incomplete contact category brief. A brand will specify “food packaging” without clarifying whether the ink surface faces inward or outward, or whether a functional barrier (laminate, inner bag, tray) exists between the printed surface and the product. That distinction changes the migration test protocol and the ink system we specify. A single clarification call at brief stage saves one to two sample iterations and typically 10–15 working days.

Our standard timeline for compliance documentation on a new substrate-ink combination is 18–25 working days, including DoC collection from our ink supplier, internal QC-F14 cure verification, and final DoC compilation. If third-party migration testing is required — which we recommend for any new food-contact combination — allow an additional 15–20 working days through our accredited testing partner. Rush timelines are possible but compress our ability to catch documentation gaps before they reach you.

Frequently Asked Questions #

What documentation do we receive with a food-contact print job?
Standard deliverables include: our facility’s Declaration of Compliance referencing EC 10/2011 or FDA 21 CFR as applicable, the ink supplier’s DoC tied to the specific formulation batch, SDS for all ink components, and our QC-F14 cure log confirming lamp output at time of production.

Is the Swiss Ordinance SR 817.023.21 mandatory for EU shipments?
It is not legally mandatory in EU member states — it’s Swiss national law. In practice, the SR 817.023.21 positive list is the most comprehensive positive list currently available for printing inks and is accepted by most major EU retailers as a compliance reference. Until a dedicated EU regulation for printing inks is adopted, this is the standard most converters and brands rely on.

We’re launching in the US and EU simultaneously. Do we need two separate ink systems?
Not necessarily, but the answer depends on your substrate. UV inks compliant with EC 10/2011 (including photoinitiator restrictions) will typically satisfy FDA 21 CFR functional barrier requirements if cure energy exceeds 120 mJ/cm². The variable is MOSH/MOAH from the substrate — the EU is far more restrictive on this than the US. If your substrate is recycled board, you may need a barrier coating to hit EU compliance even if the ink system is the same.

How often do ink suppliers update their formulations, and does that affect our DoC?
This is where ongoing supplier management matters. Any formulation change — even a pigment source substitution — can invalidate an existing DoC. Our supplier qualification procedure requires written notification of any formulation change within 30 days, followed by re-evaluation under our Supplier Compliance Gate. For high-risk food-contact applications, we require annual reconfirmation even without declared changes, because raw material sourcing within an ink supplier’s supply chain can shift without notice.

What’s the risk if we skip third-party migration testing and rely only on the ink supplier’s DoC?
The DoC confirms the formulation is compliant in theory. Migration testing confirms it is compliant under your specific substrate, process, and contact conditions. The gap between the two is where most compliance failures occur in practice. For EU markets specifically, several major grocery retail programs (including those following GlobalG.A.P. Integrity Standards) require brand owners to hold independent migration test data, not just supplier declarations. A supplier DoC alone will not satisfy a retailer audit request.

Do REACH restrictions apply to inks on non-food packaging?
Yes — REACH Regulation (EC) No 1907/2006 applies to all articles placed on the EU market, regardless of food-contact status. SVHCs above 0.1% w/w in an article must be declared throughout the supply chain. For packaging, this means pigments containing restricted substances — certain azo colorants, cadmium-based pigments, lead-based driers — cannot be used regardless of whether the product inside is food.

We need REACH compliance documentation but our timeline is 3 weeks. Is that feasible?
For existing jobs on previously qualified ink systems, our standard REACH declaration can be issued in 5–7 working days. For new ink systems or substrates we haven’t run before, the timeline is 18–25 working days minimum. Rushing the documentation process creates gaps, and a gap in a REACH declaration carries the same customs risk as not having one.

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