Last March a Danish bakery chain sent our Qingdao plant a sample brief that set off a month of arguments. Their brand team wanted bright white gift bags with a cobalt logo — the kind that sit on a shelf next to white cake boxes. Their purchasing manager wanted the natural brown kraft they had bought for six years, because it cost less and nobody had ever complained. Both were right, and the argument wasn’t really about colour. It was about whiteness definition, print fidelity, and what happens when two mills disagree about what “white” means.
We’ve run white kraft on our bag lines since 2016. Here is what the decision actually looks like from the production floor.
How white kraft is made, and why the two routes differ
There are two ways to get a white surface, and buyers often don’t know which one they bought. The difference shows up at the fold, not on the spec sheet.
Bleached (fully bleached) kraft is pulp bleached through to the core, usually by an elemental-chlorine-free process. The sheet is white all the way through, so a torn edge or a folded gusset looks the same as the face. We use it for bags where the inside is visible — open-top shoppers, bags with a die-cut handle hole.
White-top duplex is a grey or brown recycled board with a thin white coating layer on one side. It’s cheaper and stiffer, and it hides the inside colour. Turn it over and the back is grey. For a gift bag with a turned-down top edge, that grey line is visible, which is why we usually fold white-top board so the white side wraps over.
Bleached kraft at 150 gsm behaves differently from white-top at 200 gsm with a 60 gsm white liner. The first folds with a cleaner crease; the second holds a boxed gift upright with less sag. Duplex is often the better structural answer for a bag that must stand on a shelf empty.
Whiteness is not one number
“White” on a spec sheet usually means ISO brightness (457 nm) or CIE whiteness (D65). They don’t move together. A sheet can read 92% ISO brightness and 130 CIE whiteness, or 85% ISO and 118 CIE. Ask for which one, or you’re comparing two different rulers.
Typical ranges we see:
- Bleached kraft, uncoated: 82–90% ISO brightness, CIE whiteness 110–135
- Coated white-top: 88–94% ISO, CIE whiteness 125–145, but only on the coated face
- Off-white “natural white” kraft: 78–84% ISO — warmer, and less likely to look blue next to cream packaging
The gap between 82 and 90 ISO is the difference between “cream” and “paper white.” On a white bag with a pure magenta or cyan logo, that gap reads as a different brand colour.
The lot we had to replace: a mill-mismatch story
That Danish order ran 40,000 bags in two shipments. We made the first 25,000 from mill A’s 170 gsm bleached kraft. Mill A ran out mid-order and, rather than delay, our scheduler pulled 15,000 bags from mill B’s equivalent grade — same gsm, same ISO brightness claim on the certificate.
The retailer’s QC held the second shipment at their DC and photographed it next to the first. Mill B’s sheet ran about 4 CIE points warmer and slightly duller under their store lighting. Under daylight, barely visible. Under 3000 K retail LED, the whites did not match, and the cobalt logo looked different on each pallet. They rejected the 15,000 bags on the grounds of colour mismatch across a single order.
We re-ran the lot from mill A, ate the freight, and changed our process: for any white kraft order above 10,000 pieces, we now lock the mill and lot number into the PO and refuse substitutions without written approval. If you are ordering white kraft, put that clause in yourself: one mill, one lot, one whiteness target, stated in CIE and ISO.
White vs brown kraft, compared honestly
| Factor | White kraft (bleached) | Natural brown kraft |
|---|---|---|
| Cost, FOB | Base +8–20% typical; coated white-top can be +25% | Base |
| Print colour fidelity | High — true cyan, magenta, white overlays | Muted; ink shifts warm |
| Grease and dirt visibility | High — a fingerprint shows | Low — hides handling marks |
| Recyclability | Recyclable in standard paper streams | Recyclable in standard paper streams |
| Typical MOQ, custom print | 5,000 pcs | 3,000 pcs |
| Whiteness batch variance risk | Moderate to high between mills | Low relevance |
| FSC availability | Yes, on request with chain-of-custody | Yes |
The recycling row surprises people. Bleached fibre is still paper fibre. It goes in the same mixed-paper stream as brown kraft, and repulps fine. The difference is upstream, not downstream.
The environmental question buyers will ask
Bleaching consumes more energy and chemicals than unbleached kraft, and that is a real cost you carry in your Scope 3 numbers. Most modern bleached kraft comes from ECF (elemental chlorine free) mills; TCF is available but scarce. Ask for the mill’s bleaching route in writing, because “eco-friendly white kraft” on a website is not a process description.
FSC chain-of-custody certification is available on both white and brown kraft, and we hold it for our standard range. FSC covers where the fibre came from, not how it was processed — so an FSC white kraft bag is responsibly sourced and still bleached. Say that plainly to your sustainability team before they put a claim on the packaging.
One more point on claims: EN 13432 covers industrial compostability of packaging, and kraft gift bags are not certified to it. A 170 gsm kraft bag with a laminated film, glued seams and a rope handle will not break down in a home compost bin on any useful timescale. Don’t let a supplier put a compostable logo on a kraft bag. If you need certified compostable, that’s a different substrate conversation.
Gloss finish: lamination or coating?
Brand teams often ask for a “glossy white” bag. There are two routes and they have different end-of-life stories.
Film lamination (usually BOPP, 15–20 micron) gives the highest gloss and the best scuff resistance. It also makes the bag harder to recycle — the film has to be separated, and many mills will downcycle the sheet. Cost adds roughly USD 0.03–0.06 per bag at 20,000 pieces.
Water-based or UV varnish coating gives 60–70% of the gloss, keeps the bag in the paper stream, and costs about a third of lamination. On white kraft it also deepens the white slightly, which most clients like. For bakery and food bags we default to aqueous coating, never film.
Food contact: what applies to a bakery bag
If the bag touches the product directly, the paper components fall under FDA 21 CFR 176.170 in the US market — paper and paperboard components of food-contact articles. The mill’s furnish and any coating must comply, and you need the supplier’s declaration, not a verbal assurance. In the EU, food-contact compliance runs through framework regulation 1935/2004 and GMP 2023/2006; ask for the declaration of compliance with migration test data.
White kraft is not automatically safer than brown. The risk sits in the coating and the ink, not the fibre colour. Aqueous coatings with a food-contact declaration are our default for bakery bags; UV varnish generally isn’t suitable for direct contact with greasy pastry, and film lamination needs a functional barrier discussion. Grease resistance is separate again — a 170 gsm white kraft bag will wick butter within a few hours unless you specify a grease-resistant liner or a coated grade.
Also relevant for EU buyers: PPWR (EU 2025/40) sets recyclability and recycled-content requirements for packaging placed on the market, with obligations phasing in from 2028 onward. A mono-material paper bag with aqueous coating is well positioned; a film-laminated one is not. Worth knowing before you lock a design for three years.
Cost, MOQ and lead time
For reference, our standard white kraft gift bag — 180 gsm bleached kraft, twisted paper handle, four-colour flexo print — runs about USD 0.14–0.22 FOB Qingdao at 20,000 pieces, depending on size and handle. The same bag in natural brown kraft is typically USD 0.12–0.18. Custom print starts at 5,000 pieces on white, 3,000 on brown, because white requires a dedicated make-ready and, for tight colour targets, a lot-locked paper run.
Lead time is 18–25 days for production after artwork approval, plus 25–30 days sea freight to Northern Europe. Add two weeks if you want a mill lot certificate and a pre-production colour proof — and on white, you do want the proof.
Full spec sheet and size range: kraft gift bags. If your artwork is already final, send it with the whiteness target and we’ll quote both white and brown so you can see the delta on your own numbers: request a quote. Buyers comparing the whole packaging cost, not just the bag, may find our paper cup cost breakdown useful for benchmarking freight and duty.
What I’d tell a buyer deciding today
If your brand is built on clean white shelf presence, white kraft earns its 8–20%. Pay for lot locking and a colour proof, and put the mill name in the PO. If the bag is a handled carrier that will be scuffed, rained on and stuffed under a table, brown kraft is more forgiving and nobody will notice. What went wrong for us in Jutland — two mills, one order, 15,000 bags stranded — starts with nobody writing the whiteness number into the contract.
Send us your bag size, gsm target and a photo of the packaging it will sit next to. We’ll tell you honestly whether white kraft will match it or whether you’re better off with brown.
