Zip Lock Paper Bags.

A zipper has to be heat-welded into the bag, and bare paper cannot seal to itself or to the zipper strip. The thin liner inside gives the sealing bar something to bond to, at the zipper and along the side and top seals. On our standard build that liner is PE laminated to kraft.

It also works as the moisture and grease barrier, which paper on its own can't provide.

The bag is sealed shut above the zipper after filling, and the first opening is a tear from a small notch in the side seal. Tearing across removes that factory seal. After that, the press-zip underneath opens and closes the bag for as long as it lasts.

We place the tear line far enough above the zipper for fingers to grip. For packs opened several times a day, we specify a heavier zipper gauge.

Some builds are, and the deciding factor is how much of the bag is paper compared with plastic. A high-paper-ratio bag with a very thin liner can go into the paper recycling stream. A standard kraft and PE bag usually cannot, because the film content is too high for most paper mills to accept.

We match any recycling mark to the build you order. The other route is a certified compostable liner and zipper, and both must carry certification for the claim to stand.

Choose a greaseproof liner for oily fills such as nuts and granola, and a standard PE liner for dry goods. Oil wicks through untreated paper and leaves dark patches spreading across the printed face. The greaseproof tier stops it before it reaches the kraft.

Send us a sample of the fill and we'll suggest the liner. Barrier is chosen by what goes in the bag, and the print has no bearing on it.

A matte kraft face with clean modern type is the usual choice, printed in one or two colours. The natural brown reads as a premium pantry item next to glossy plastic pouches. If you need photography or bright colour, switch to a white paper face.

Matte or gloss lamination, spot UV and foil are all available. Lamination changes how recyclable the bag is, so tell us the claim you want before we settle the finish.

Our two regular stand-up sizes are 5 x 3 x 8 inches and 6 x 3.5 x 10 inches, given as width, gusset and height. The height includes the tear strip and zipper band, so usable fill height is a little less than the headline figure. The gusset opens into a flat base that lets the bag stand on a shelf or counter.

If your fill weight falls between the two, we can make a custom size.

We make them from 500 units upward. That minimum is the same whether you choose the standard kraft and PE build, a high-paper recyclable build or a compostable liner. Large runs go to 100,000 bags.

For a new product line, a small first order also lets you check how the zipper holds up in daily use before you commit to volume.

Plan on 7 to 10 business days of production after proof approval, plus transit. Where a date is tight, we can rush the job through in 5 to 7 business days. Samples, which we recommend for any new liner and fill combination, take 5 to 7 business days, and the sample charge is credited against your bulk order.

We ship to every state in the USA.