Folding Carton Food-Grade: What Makes a Box Safe for Food Contact</trp-post-co...

Folding Carton Food-Grade: What Makes a Box Safe for Food Contact

Food-safe board, food-grade inks, grease-resistant linings and FDA compliance. Understand what makes a folding carton safe for direct food contact. Chengtop Packaging’s food safety guide.

Understand food-contact vs non-food-contact packaging

Know the difference between food-grade board and regular board

Learn about food-safe inks and coatings

Know when you need grease-resistant lining

Understand FDA and food safety standards

Avoid common food packaging mistakes

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Food Safety Starts With The Box

If your product touches the inside of the box, the box material matters. Regular printing ink on the inside of a food box can transfer chemicals to your product. Food-grade folding cartons use safe materials that won’t leach into food. This isn’t optional — it’s a regulatory requirement for food products.

Food Contact vs Non-Food Contact

	Non-Food Contact	Food Contact
What touches food	Nothing — food is in a separate bag/jar	The box itself touches food
Board required	Standard SBS/C1S	Food-grade SBS or kraft
Ink on inside	OK	Must be food-safe
Forro	Not needed	Grease-resistant if needed
Custo	Padrão	+5–15%

Examples: Cereal box = food contact (cereal touches inside). Makeup box = non-food contact.

Food-Grade Board Types

Board Type	Food Contact	Ideal para
SBS (Solid Bleached Sulfate)	Sim	Dry food, snacks, confectionery
C1S Coated	Yes (food-grade)	Bakery, dry food
Papel Kraft	Sim	Natural, eco-friendly food
Bleached kraft	Sim	Premium food packaging
Recycled board	No (for direct contact)	Outer packaging only

Recycled board isn’t recommended for direct food contact — trace contaminants can transfer.

Food-Safe Inks & Coatings

Standard printing inks aren’t food-safe. For food contact:

Offset inks — Standard, not food-safe for direct contact

Water-based inks — Food-safe, low migration

UV inks — Food-safe when properly cured

Water-based varnish — Food-safe coating

No UV varnish on food-contact side — Can have residual chemicals

We print the outside of the box with standard inks. The inside remains blank food-grade board.

Grease-Resistant Lining

For greasy or oily foods:

PE (polyethylene) lining — Grease-resistant, waterproof

PLA lining — Compostable, eco-friendly alternative

Wax coating — Traditional, less common now

No lining — For dry, non-greasy foods

Ideal para: Fried snacks, baked goods, chocolate, oily foods.

Food Safety Standards

Padrão	Region	What It Means
FDA 21 CFR	USA	Food contact materials must be safe
EU 1935/2004	Europe	Food contact materials regulation
GB 4806	China	National food contact standard
Com certificação FSC	Global	Sustainable paper source

We supply food-grade cartons that meet these standards. Ask for documentation when ordering.

When You Need Food-Grade Cartons

Produto	Food-Grade Needed?
Cereal / granola	Yes — direct contact
Cookies / biscuits	Yes — direct contact
Chocolate	Yes — direct contact
Tea bags (in box)	Yes — direct contact
Coffee (whole bean)	Maybe — usually in bag first
Snacks in plastic bag	No — bag protects
Beleza / cosméticos	Não
Pharmaceuticals	Depends on product