What kraft paper actually is
Kraft paper is made from wood pulp produced by the kraft process — a chemical pulping method that uses sodium hydroxide and sodium sulfide to break down lignin in wood chips while preserving the cellulose fibers. The result is a paper with much higher tensile strength than mechanical-pulp papers (newsprint, magazine stock), because the long cellulose fibers are intact and bind well during sheet formation.
“Kraft” is German for “strength” — the process name itself is the engineering claim. A 80gsm kraft paper has roughly 3× the tensile strength of a 80gsm mechanical-pulp paper, which is why kraft has been the default substrate for shopping bags, sacks, and structural papers for over a century.
In food packaging, kraft shows up in three architecturally distinct forms:
- Brown unbleached kraft — the classic “craft paper” look. Lignin and pulp residues give the warm brown color.
- Bleached white kraft — chemically whitened during pulping. Better print contrast, slightly weaker.
- Recycled kraft — post-consumer waste fiber. Gray-flecked appearance, increasingly demanded by sustainability-led brands.
Why raw kraft alone doesn’t work
Buyers new to packaging often ask: “Can’t we just use kraft paper for the whole bag?” The honest engineering answer: no, never, not for shelf-stable food.
Raw kraft paper has effectively zero oxygen barrier, zero moisture barrier, and minimal grease resistance. A 250g coffee bag made of raw 80gsm kraft would let air through within hours, wick oils from oily roasts within days, and pick up enough humidity in a 70% RH warehouse to feel soft and limp within a week. The coffee inside would taste stale at retail.
The version of kraft that actually ships in food packaging is always a hybrid laminate:
| Stack | Inner liner | Shelf life | Recyclability |
|---|---|---|---|
| Kraft + PLA + PE | PLA coating + PE inner | 8–10 months | Industrial-compostable (BPI / TÜV) |
| Kraft + PE only | PE inner | 6–8 months | Paper-stream recyclable (most regions) |
| Kraft + Aluminum + PE | Foil barrier | 18–24 months | Not curbside-recyclable |
| Kraft + Wax (greaseproof) | Wax coating | Days only (QSR use) | Composts in food-waste stream |
The first three are what we ship for retail food packaging. The fourth is QSR / takeaway packaging, where shelf life isn’t a factor.
The “kraft look” without the kraft compromise
A clever modern alternative: kraft-look BOPP. This is BOPP film printed with a kraft-color background and matte finish, simulating the visual cue of brown kraft paper while delivering the full barrier of metallized BOPP underneath. Cost is comparable to standard BOPP-laminate; visual matches kraft within 90%; barrier matches metallized BOPP.
We’ve shipped this for clients who wanted the artisan look but had real shelf-life requirements that PLA-coated kraft couldn’t meet. The trade-off: it’s plastic, not paper, so the sustainability story is different. Brands that lead with sustainability claims usually go real kraft + PLA; brands that lead with aesthetic usually accept kraft-look BOPP.
FSC certification — increasingly mandatory
The Forest Stewardship Council (FSC) chain-of-custody certification system tracks paper from forest to finished product. There are three tiers:
- FSC 100% — all fiber from FSC-certified forests
- FSC Mixed — at least 70% from certified or recycled sources
- FSC Recycled — 100% post-consumer or industrial recovered fiber
Major retail chains have made FSC certification a default-spec requirement for paper packaging:
- Whole Foods Market — FSC Mixed minimum on all paper packaging
- Aldi / Lidl (EU) — FSC requirement across paper SKUs
- Carrefour (EU) — FSC requirement
- IKEA (food sections) — FSC 100% requirement
- Costco — increasingly requiring FSC on paper packaging
For brands targeting these retail chains, FSC is non-negotiable. The cost premium is small (typically 4–7% over non-certified paper); the lead time impact is zero. We carry FSC chain-of-custody certification on our paper-handling line and stamp the FSC logo on the packaging on request.
The four kraft stacks we ship most
Artisan coffee tin-tie bag (12oz / 340g): Brown kraft 80gsm + PLA 12µm + LDPE 60µm with tin-tie closure, optional PET window patch. BPI compostable. Cost: $0.22–$0.95 per bag.
Granola / snack stand-up pouch (250g): Brown kraft 100gsm + aluminum foil 7µm + LDPE 60µm with zipper. 18-month shelf life. Cost: $0.35–$1.20 per pouch.
Premium chocolate folding carton: White kraft 350gsm folding-grade with soft-touch lamination and spot UV. FSC Mixed. Cost: $0.45–$1.40 per carton.
DTC subscription mailer: Recycled kraft 200gsm corrugated outer + printed inner liner. FSC Recycled chain-of-custody. Cost varies by carton dimensions.
Recycled kraft — the visual signal customers are now reading
In 2024–2026, recycled-content kraft moved from niche-sustainable to mainstream. The gray-fleck appearance of post-consumer recycled kraft is now a positive brand signal in many specialty food categories: it visibly communicates “this is recycled” without needing to print a sustainability claim.
Pricing: PCR kraft costs roughly 12–18% more than virgin kraft due to supply constraints (food-grade PCR fiber requires extra cleaning steps). Lead times are 5–10 days longer because PCR mills run smaller, less frequent batches. For specialty coffee, craft chocolate, and natural-snack brands, the cost adder and visible “recycled” signal are usually accepted.
The honest constraint: PCR kraft has 8–12% lower tensile strength than virgin kraft. For applications requiring high burst resistance (heavy fill weight in stand-up pouches), we’ll spec 100gsm PCR vs 80gsm virgin to compensate.
Carbon footprint — paper’s complicated story
The kraft sustainability case is genuinely strong, with two important caveats:
Where kraft wins:
- Pulp is renewable (forest regrowth) vs petroleum-derived plastic
- End-of-life decomposition is fast and benign in paper or compost streams
- FSC-certified forestry maintains forest carbon stocks at sustainable levels
- Recycled kraft uses 40% less energy than virgin kraft
Where the story gets nuanced:
- Per-finished-pack weight, kraft is 2–4× heavier than plastic — more freight emissions per unit shipped
- Kraft pulping is energy-intensive (kraft mills are major industrial energy consumers)
- Non-FSC kraft can come from poorly stewarded forests with real biodiversity impact
- PLA-coated kraft, while compostable, requires industrial composting infrastructure that doesn’t exist everywhere
The lifecycle assessment honest answer: FSC-certified kraft with PLA inner, sent to a market with industrial composting access, has measurably lower environmental impact than the equivalent plastic packaging. Without those conditions, the comparison is closer than the marketing suggests.
When NOT to use kraft
The cases where we’ll steer a client away from kraft:
- Long ocean-freight to humid markets (Southeast Asia, equatorial Africa). Kraft picks up moisture; finished bags feel soft on arrival. Use plastic with kraft-look print instead.
- High-fat or oily product contact (premium chocolate, ghee, nut butters). Oil wicks through PLA over time. Use foil-lined kraft or full-plastic stack.
- Long shelf life above 12 months. PLA-coated kraft caps at 8–10 months on most products. Foil-lined kraft works to 18+ months but loses the compostable story.
- Microwave or oven applications. Kraft chars; PLA softens. Spec ovenable PET or paper-board with high-temp coating instead.
- Tight retail margin SKUs (under $5 retail) where the kraft premium can’t be recouped. Use printed plastic with kraft-look art.
For specialty coffee, craft chocolate, artisan bakery, premium snacks, gift packaging, and any product where the visual signal of “natural / sustainable / craft” justifies an 8–15% retail price premium, kraft is a powerful spec choice. Combined with the right inner liner, it ships food across all reasonable shelf-life expectations.
How we spec kraft for clients
The decision tree we walk through:
- What’s your shelf-life target? Under 10 months → kraft + PLA + PE (compostable). 10–18 months → kraft + foil + PE (not compostable). Over 18 months → foil-based stack instead.
- Is the product oily or fatty? If yes → foil-lined kraft or skip kraft entirely.
- Is FSC certification required by your retailer? Almost always yes for chain retail. We default to FSC Mixed.
- Is recycled-content signaling part of your brand? If yes → PCR kraft, accept the 12–18% premium and 5–10 day lead time addition.
- What climate does the finished pack ship through? Humid ocean freight reduces kraft performance; spec a heavier base weight (100gsm vs 80gsm) and consider laminate moisture-barrier upgrade.
We’ll come back with two kraft stack options and one kraft-look plastic alternative so the trade-offs are visible side-by-side in writing.