Buyers should choose a resealable adhesive strip when users need repeated access and a permanent strip when the bag should stay closed after final packing. The decision must also define tape position, flap length, liner handling, product contact risk, and acceptance tests on the intended OPP bag.

Buyers should choose a flat greaseproof paper bag for thin, uniform items and a gusseted bag for thicker or irregular orders. The choice depends on product depth, portion variation, loading, closure, and artwork. Approve the format with real filled samples before bulk production.

I choose a Doyen-style bottom when a rounded support seal and upright presentation fit the brief. I consider a K-seal when diagonal corner seals suit the size, fill, and production method. The final choice should follow factory capability plus filled-pouch, shelf, handling, and case-pack tests.

I specify an eye mark from the machine sensor, web direction, repeat length, mark track, contrast, size, and cutoff offset. Buyers should get the machine maker’s written requirements, place the mark on the approved dieline, and test printed film at production speed before bulk release.

I choose a three-side-seal retort pouch when flat handling, controlled headspace, retort loading, and compact case packing lead the brief. I choose a stand-up format when upright shelf use justifies the gusset. The processor must validate the final package and scheduled process.

I set the lip above a PE ziplock bag zipper from the filling method, finger access, final heat seal, tear notch, hang hole, and artwork. Buyers should not copy one universal dimension. They should approve the open, filled, sealed, and reopened bag on the intended packing line.

I size a side-gusset bread bag from the cooled loaf’s maximum width, height, length, closure allowance, and packing method. The gusset must open around the loaf without tight corners or excessive loose film. Buyers should approve repeated filled samples before setting bulk dimensions.

I choose a flat-bottom coffee bag when a stable base and multiple display panels support the retail plan. I choose a side-gusset bag when its folded format and existing packing method fit better. Buyers should confirm either choice with filled line, shelf, and carton trials.

I choose natural kraft for a warmer, fiber-visible background and white kraft for a brighter, more neutral print base. Buyers should approve artwork on the actual paper, then specify the complete laminate, sealing, barrier, window, closure, product, and process requirements separately.