Write ECT or burst, not both mixed on one cell. A 32 ECT single-wall RSC is not a 275 lb burst double-wall shipper.
Specification desk
corrugated box supplier
Resolve open choices that still block a comparable corrugated box supplier quote: flute profile, edge crush test or burst strength, box style, print process, and which food-contact or fiber files the named board must carry. Accepting an alternative construction without those checks mixes two products on one price.
Values to write before a factory substitutes
Copying a catalog flute onto a case erector that was set for another flute produces jam or crush. State the line window, not a marketing maximum.
Paperboard caliper of the liner is not a box size. Ask the factory to restate inside dimensions on the quote.
A regular slotted container is not a die-cut mailer. Substituting one for the other without restating the die line is a different product.
| Open choice | What must be verified | When an alternative is acceptable |
|---|---|---|
| Single-wall vs double-wall | ECT or burst, stack height, dwell | Only if the buyer restates strength and pallet height in writing |
| Kraft liner vs test liner | Print face, puncture, fiber-claim file | Only if the buyer accepts the print and puncture change |
| Plain vs printed | Color count, process, plate or digital setup | Only if artwork status and extra costs are listed outside the piece price |
| Food-contact board | Named liner file and, if ink contacts food, migration testing | Only if the substitute board carries its own file, not a category letter |
Documents to request from the named factory
-
Board and construction sheet
Names flute profile, liner, ECT or burst, and whether the box is slotted or die-cut. A directory label is not this sheet.
-
Food-contact and fiber-claim file
FDA 21 CFR and, if required, FSC or post-consumer recycled content evidence. The file must name the quoted board. This website does not hold a site-wide food-contact or FSC badge.
-
Print and die line
Color target, flexographic printing or digital, and die line revision. Missing die-line data is a frequent cause of panel shift that gets blamed on a bad factory.
-
Factory quality file if the buyer asks
ISO 9001 or BRCGS Packaging that names that plant. These are supplier files, not Rsc Corrugated Box Sourcing certificates.
Checks in the order they usually block a quote
-
Style and size
Confirm RSC versus die-cut and write inside dimensions. This is the first substitution error on mixed RFQs.
-
Flute and strength
Restate flute profile and ECT or burst. Paperboard caliper of the liner is added when print registration is the duty, not as a replacement for strength.
-
Print process trade-off
Digital can reduce plate cost on short SKU lists. Conventional flexographic printing often keeps unit cost and spot color steadier on long runs. Write which side the buyer accepts.
-
Contact and recycling files
Food-contact and post-consumer recycled content claims attach to the named batch. A recyclable kraft liner can help reporting; a coated or waxed board may still be required for wet dwell. Record the choice. Do not treat either side as a site slogan.
Return to the inquiry options or send the open specification list.
Send the open specification list
We will ask factories to quote the same flute, size and exclusions. We will not invent a savings percentage.
Request Factory Quotes