Frozen packaging fails in ways that room temperature packaging does not, and it usually fails after the freezer rather than in it. A carton that looks fine at minus eighteen degrees can slump when it comes out and condensation soaks into the board. Plan for both states.
Cold, and then wet
At freezer temperature the risks are adhesive and material behaviour. Glue lines can become brittle, pressure sensitive labels can lift at the edges, and some films stiffen and crack. Those are solved by specifying cold-rated adhesives and confirming the label stock with your label supplier against your real storage temperature.
The wet phase is harder. When frozen product comes out into a warm room, moisture condenses on every surface. Corrugated absorbs it, loses stiffness, and a pallet that was stable becomes a leaning stack. This is the single most common frozen packaging failure and it is a board and coating decision.
Board and coating choices
Moisture resistant corrugated, wet strength treatments, and poly-coated or laminated board all exist to slow water uptake. Each trades differently against cost and against recyclability, since a poly coating puts plastic into a paper pack. If a recycling claim matters for your market, raise it before the coating is chosen rather than afterwards. Whatever you specify, design stack headroom in, because the published strength of any board is measured dry and flat.
Refrigerant options compared
| Refrigerant | Behaviour | What it does to the pack |
|---|---|---|
| Gel packs | Freeze and thaw; reusable | Add real weight to every parcel, and they sweat as they thaw, so the pack must handle liquid water |
| Dry ice | Sublimates from solid to gas, so it disappears | Must never be in an airtight container, because the gas has to vent. Carrier and air transport rules apply |
| Phase change materials | Hold a target temperature band rather than the coldest possible | Useful where the product must not freeze harder or thaw, and usually the most expensive option |
Whichever you pick, confirm the current carrier requirements yourself before you design the pack, since refrigerants carry handling, labelling and quantity rules that change and that differ between ground and air.
Insulation and the outer carton
An insulated shipper is usually a liner inside a corrugated outer: expanded foam, a foil faced bubble liner, or a molded pulp or paper based liner. The outer carton carries the print, the stacking load and the shipping marks, and the liner does the thermal work. Size the carton around the liner, not around the product, because liner wall thickness is substantial and it is easy to forget until the quote comes back wrong.
Artwork survives the freezer or it does not
Print directly on a coated surface where you can, since applied labels are the weak point at low temperature. Keep critical information off panels that will be under condensation or under a strap. If the pack carries food information, lay the mandatory panel out first and confirm it with your regulatory advisor; we print what you supply and approve.
Minimum, price and lanes
Minimum order is 100 boxes, from about $0.48 per unit at bulk volumes, confirmed on your written quote, with die, plates, design support, US shipping and a digital proof before anything prints included. Production runs Rush (expedited production plus air freight), Standard (air) or Cost saver (sea), from about 7 business days, plus 2 to 5 for delivery, with specialty imported items up to about 12 weeks. Rush carries about 7 to 25%, depending on the job.
Tell us the storage temperature, the transit time and whether the pack is retail or direct to consumer, and we will quote a board and a coating against it at /quote/. For the case packing side, see what a master carton is, and custom food boxes covers the wider category.
