Kraft is the default look for natural, organic and artisan food brands — but "kraft" is a family of structures, not one material. This guide explains what sits behind the paper, how to get grease and moisture resistance, which format fits your filling line, and what custom printed kraft bags actually cost.
Kraft's brown fibre reads as natural, minimally processed and honest on shelf — the visual cue behind most organic, coffee, tea, bakery and snack brands. Beyond the look, a kraft paper bag is light (cheaper to ship than jars or tins), ships flat (cheap to store before filling), and is widely accepted in paper recycling streams when built as a mono-material.
The trade-off is that paper alone blocks almost nothing: grease, oxygen and water vapour all pass through it. Every real food-grade kraft bag is therefore a laminate — paper on the outside, a functional layer inside. Understanding that stack is the whole buying decision.
A food kraft bag is typically three to five layers. The outer kraft paper (40–80 gsm) carries the print and the tactile feel. Inside sits the barrier: PE or PP film for moisture and heat-sealing, aluminium foil where light and oxygen barrier matter (coffee, nuts), or a grease-resistant coating for bakery and fried snacks. Some builds add a middle PET layer for puncture resistance.
Tell your supplier the product, target shelf life and filling method and they will quote a structure such as kraft 70 gsm / PET 12 µm / PE 60 µm. Heavier paper feels more premium but adds cost and weight; 40–60 gsm is the usual sweet spot for retail sizes.
Match the barrier to the food, not to the trend. Dry goods (tea, granola, rice, pasta) need moisture barrier only — a PE liner is enough and keeps the bag closer to a recyclable mono-material. Oily or fatty products (nuts, chips, oily coffee, dried meat) need grease resistance plus an oxygen barrier: foil or metallised laminate, often with a one-way degassing valve for coffee.
Chilled or frozen food needs a freezer-grade PE that stays flexible at low temperature. Ask your supplier for a water vapour transmission rate (WVTR) — and for coffee, an oxygen transmission rate — then confirm with a real shelf-life test on your own product rather than a datasheet alone.
Format follows shelf presence and filling method. Block-bottom and flat-bottom kraft bags stand and stack like a box — the classic coffee and bakery look. Side-gusset bags are the cheapest per unit and fill fast on manual lines. Stand-up versus flat bottom comes down to how much shelf face you need against how much material you want to pay for.
Closures: tin-tie for bakery and short shelf-life products, zipper for multi-serve snacks and coffee, heat-seal plus tear notch for single-serve. Always confirm bag dimensions and gusset against your filling machine before ordering — a bag that seals perfectly by hand can jam an automatic line.
Kraft is a forgiving surface, but not a neutral one. Flexographic and gravure printing both work well; on brown kraft, colours sit darker than on white film, so a white ink underlay is standard when you need accurate brand colours. Digital printing suits short runs and brands with many SKUs.
Finishing options that stay on-brand: matte varnish, spot UV, and a paper window that shows the product. Keep to three or four colours for a clean natural look — heavy coverage fights the very appeal of the material.
For food contact, request FDA (21 CFR) or EU 10/2011 test reports for the finished laminate plus a food-contact declaration per batch; ISO 9001 or BRCGS packaging certification is the usual factory baseline.
Typical pricing: plain stock kraft bags from about $0.04–0.09 per piece; custom printed from $0.08–0.20 at 5,000–10,000 pieces depending on structure and colour count. To launch small, see how to lower your custom pouch MOQ — digital print on stock sizes can start at 500–1,000 pieces. Request a quote for your kraft food bags →
