Food contact black masterbatch: what a buyer actually has to specify
Every black masterbatch supplier says "food grade". The phrase on its own means nothing — food contact is a regulatory claim, and it is proven with a restricted raw-material list and paperwork, not adjectives. Here is what the rules actually require, and the exact documents to ask for before you commit a volume order.
By Zoe Lin, Export Manager, E-LUCK (Guangdong Yijuyuan Plastic Industry Technology Co., Ltd.)
1. "Food contact" is a claim with legal weight
The moment a black masterbatch touches packaging that touches food — film wrap, dairy lamination, trays, caps, cutlery, meal boxes — it stops being a colourant and becomes a food-contact material. In the EU that world is governed by Regulation (EU) No 10/2011 on plastic materials intended to come into contact with food. In the United States the equivalent framework sits in the FDA food-contact regulations (21 CFR, principally the polyolefin and colourant sections).
A supplier who cannot tell you which framework their grade was built for, and what documentation comes with it, is not selling you a food-contact product. They are selling you a black compound and hoping it passes.
2. The two rulebooks you will meet most
EU 10/2011 works on a positive-list principle. Only substances on the union list of authorised substances may be used, in the amounts permitted, and the finished material must respect the specific migration limits (SMLs) for each substance under the intended use conditions — including the food type, temperature and contact time. The law also sets an overall migration limit (OML) of 10 mg/dm².
FDA approaches the same problem from the polymer side: the carrier resin must be covered by an applicable food-contact regulation, and the colourant must be an authorised colourant used within the prescribed limits and purity specs. Carbon black for food contact is one of the classic cases — there is a long-established category for carbon black meeting defined purity requirements.
Neither system cares what a brochure says. Both care what is in the material and what migrates out of it. That is why the honest phrase you should expect from a supplier is "aligned to EU 10/2011" or "FDA-aligned selection" backed by statements — not the word "certified" pasted next to a product name.
3. What makes a black masterbatch food-contact at the formulation level
Three things separate a food-contact black grade from a general-purpose one:
- The carbon black itself. Only pigment grades meeting the purity requirements for food-contact use — low extractable PAHs among them. Industrial rubber-grade carbon is cheaper and absolutely not interchangeable.
- The carrier and every additive in it. Antioxidants, dispersing waxes and processing aids all count. A clean pigment in a non-compliant carrier is still a non-compliant masterbatch.
- What is deliberately left out. Heavy-metal-containing pigments, cheap fillers with uncontrolled impurities, recycled carrier of unknown history. Food-contact formulation is mostly about exclusion.
Carbon black as a pigment has a practical advantage here: locked inside the polymer matrix it barely migrates. In most real food-contact black grades, the migration conversation is really about the carrier system and additives — which is exactly where a supplier with a restricted raw-material list can give you straight answers.
4. Migration, in plain words
Migration is what moves from the packaging into the food. The regulation sets a number for each regulated substance (the SML) and a ceiling for everything together (the OML). Whether you actually have a problem depends on the use conditions: a black PP cutlery fork touching hot soup at 90 °C for 30 minutes is a far harder case than a dairy film at refrigerated temperatures.
The practical consequence for buyers: always state your use condition when you ask for a food-contact grade — food type (aqueous, fatty, dry), temperature, and contact time. A supplier who quotes without asking any of those three questions is not doing the analysis your QA team will eventually have to do anyway.
5. The paperwork to ask for — the real test of a supplier
Documents are where food-contact claims survive or collapse. Before a volume order, ask for:
- A food-contact statement for the specific grade, naming the market it is written for (EU 10/2011, FDA, or GB for China) — not a generic "food safe" letter.
- Migration test summaries or references for the conditions you actually run, or a written commitment to support the testing.
- Support documentation from the pigment producer — the carbon black supplier's own food-contact compliance letter for the pigment grade used.
- A change-notification clause: if the supplier switches a raw material in the formulation, the food-contact status is re-confirmed before shipment, and you are told.
- Per-lot traceability — lot numbers on the CoA that tie the bag in your warehouse back to a documented formulation.
If you get all five without friction, you are probably dealing with a plant that runs food-contact work as a system. If you get silence or a stock certificate, budget for the risk.
6. What changes on the production floor
Compliance is not only a formula. A plant that is serious about food contact keeps food-contact grades on controlled recipes with traceable raw-material lots, and can show you where a food-contact batch records its pigment lot, carrier lot and production line. When we run food-contact work at our Huizhou plant, the point we make to auditors is the same one that matters to you: any bag we shipped can be traced back to its inputs, and any change to those inputs goes through the food-contact check again.
7. A spec template you can copy
Put these lines in your RFQ and you will filter suppliers in one round:
- Application and part: e.g. lidding film for fatty food, PP meal box
- Target market and framework: EU 10/2011 / FDA / GB — pick, or state all
- Use conditions: food type, contact temperature, contact time
- Carrier resin: PE or PP matched to your line
- Carbon black content and light-shielding requirement if relevant: e.g. opaque film for light-sensitive content
- Documents required with first shipment: grade-specific food-contact statement, pigment support letter, migration summary
- Change-notification: any raw-material substitution re-confirmed for food contact before shipping
Questions buyers ask about food contact grades
The compliance question and the technical question are different, and most packaging problems come from answering only the first.
What makes a black masterbatch grade food contact compliant?
A declaration that covers the specific grade and the specific intended use, supported by the pigment and additive set rather than by the word “food grade” on a datasheet. What matters is which migration tests were run, against which simulants, and for which food types and contact conditions. A grade suitable for dry solids is not automatically suitable for fatty or acidic foods, and the same is true of storage versus cooking. Ask for the declaration to name the simulants and the time and temperature conditions.
Does black pigment itself pose a food contact restriction?
Carbon black has historically carried restrictions in food contact applications in some jurisdictions, which is why high-purity grades exist specifically for this use. The grade you buy must be the one the declaration covers, and the declaration must be traceable to your lot. This is also a case where the supplier's certificate of analysis and the compliance declaration are different documents, and both are needed: one describes the material, the other describes its permitted use.
What is the difference between a declaration and a certificate?
A certificate of analysis describes the batch. A declaration of compliance describes permitted uses under a named regulation. Neither substitutes for the other. Buyers who accept one in place of the other will eventually have a lot that is technically on specification but not cleared for the application it was sold into. For food contact work, require both, and require the declaration to reference the grade code you actually ordered.
What should incoming inspection check for a food contact grade?
First the paperwork: the declaration must name your grade code and your application, and it must be current. Then the batch identity: the lot number on the bags has to match the lot on the certificate. Then the obvious physical checks — contamination, damaged bags, pallet condition. And then one measured value you plot over time, because a grade that drifts on a single parameter is usually telling you about storage or transport rather than about the pigment.
Continue reading
- REACH & RoHS for black masterbatch exports — the other two compliance frameworks buyers mix up with food contact.
- How to read a black masterbatch CoA — the lot-level document that proves what actually shipped.
Related pages
- Food grade black masterbatch — our food-contact series for packaging film, trays and closures
- AM4018 — light-shielding food-contact film grade — 40% carbon for dairy and vitamin-sensitive content
- AM3910 — food-contact tableware & meal box grade — PP carrier for rigid food-contact parts