Board and flute
E-flute, B-flute, C-flute or BC double-wall, plus kraft or test liner. Paperboard caliper in μm or pt if the packer already measured a sample.
Spec Review
custom corrugated box
Use this page to close open choices on a custom corrugated box before treating two factory replies as comparable. The layout is a review path: statement, open items, completeness bars and the documents to request. It is not an ESG or carbon page.
A quote is comparable only when flute profile, strength method, inside dimensions, print revision, quantity unit and destination are written the same way. An alternative construction is not accepted until the buyer records why the flute, die or board may change.
Open items that still block a comparison
Strength method
Edge crush test (example: 32 ECT single-wall RSC) or burst (example: 275 lb double-wall). The method must appear on every reply.
Print and die line
Color count, flexographic printing versus a digital short run, and the die line revision the plate or die was cut from.
Brief completeness before factory matching
These bars are a buyer checklist, not factory capacity and not a carbon target.
Limits that stay on the brief
- ECT is a laboratory edge-crush value. It is not a warehouse stack-life promise under humidity or mixed pallet patterns.
- Food-contact and ink migration files bind to liner, adhesive and ink lots. They cannot be restated as a site-wide badge.
- Die-cut tooling and printing plates sit outside piece price. A cheaper piece price that quietly omits a new die is not a lower total.
- Post-consumer recycled content in a kraft liner needs the mill sheet for that lot. Shade and short fiber can change crush results.
Digital print versus flexo on corrugated
Short SKU counts and frequent artwork changes can reduce plate cost with digital print. Stable long runs often keep unit cost and spot color control on flexographic printing. The brief should state expected reprint frequency so factories do not hide plate amortization inside a piece price.
Documents to request, not badges to display
- ECT or burst sheet that matches the quoted board
- Die line revision used for the plate or die
- Liner food-contact or migration file when the fill requires it
- PCR or fiber sheet only if the buyer asked for that liner
Close the open items, then request factory quotes
If a factory offers another flute or board, record why the die, pack-out or stack path still holds. Then split the inquiry options or send the brief.
Request Factory Quotes