Buyer guide · Quality
How should packaging dimensional tolerance be set?
Set tolerances from product fit, material variation, process capability, measurement method and the combined effect of all assembled components.
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Checklist
Quality evidence to define before production
- Finished dimensions
- Tolerance stack-up
- Die-cut tolerance
- Assembly method
- Target quantity and SKU allocation
- Approval sample and decision owner
- Required date and Mainland China delivery point
- Change and repeat-order record
Quality control
Four elements of an auditable inspection plan
Finished dimensions
Record internal and external size, measuring method and acceptable tolerance instead of relying on a photo or nominal size alone.
Tolerance stack-up
Review how material, printing, die cutting, gluing and packed-product variation combine at final assembly.
Die-cut tolerance
Set measurable cut, crease, nick, stripping and registration tolerances based on structure, material and assembly needs.
Assembly method
Document folding sequence, glue position, jigs, manual steps and workmanship standards so output is repeatable.
Execution method
Four actions from RFQ to production
Translate expectations into criteria
Use dimensions, tolerances, test methods and defect photographs.
Inspect at the right stages
Place controls at incoming material, first article, in-process and final release as risk requires.
Record traceable results
Identify lot, SKU, sample size, inspector, tools, findings and disposition.
Close corrective actions
Contain affected stock, verify root cause and confirm the fix before repeat release.
FAQ
Questions buyers often ask
How should packaging dimensional tolerance be set?
Set tolerances from product fit, material variation, process capability, measurement method and the combined effect of all assembled components.
What should be written in the specification?
At minimum, define Finished dimensions, Tolerance stack-up, Die-cut tolerance, Assembly method, then link quantity, sample, timing, inspection and the approved revision.
Is a physical sample needed?
A decision involving structure, material, colour, finish, assembly or use performance normally needs a physical sample matched to that question; a screen proof cannot approve everything.
Can the previous standard be reused for a repeat order?
Reuse a controlled standard only when files, material, structure, supply chain and use conditions remain unchanged. Record every change and decide whether resampling or reapproval is required.
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