Buyer guide · Materials
How should moisture be controlled in paper packaging?
Control warehouse conditions, conditioning time, wrapping, process sequence and inspection because moisture changes can cause curl, cracking, warp and poor adhesion.
Submit project requirements
Checklist
Material facts to request and approve
- Moisture behaviour
- Storage condition
- Film and bond
- Inspection plan
- Target quantity and SKU allocation
- Approval sample and decision owner
- Required date and Mainland China delivery point
- Change and repeat-order record
Material evaluation
Four checks before approving the material
Moisture behaviour
Consider storage humidity, paper conditioning, curling and dimensional change before printing, lamination and die cutting.
Storage condition
Set temperature, humidity, stacking, sunlight, odour and shelf-time limits for materials and finished packaging.
Film and bond
Specify film type, thickness, gloss, colour shift, edge behaviour and bond strength after creasing and die cutting.
Inspection plan
Define checkpoints, sample size, measurement tools, defect photos and release authority before production starts.
Execution method
Four actions from RFQ to production
Define the application
Start from protection, forming, print, appearance and distribution needs.
Compare physical samples
Review representative material under agreed lighting and handling conditions.
Run process trials
Test printing, creasing, gluing, finishing and packing on the proposed build-up.
Freeze an approved specification
Record supplier, grade, weight, thickness, colour and permitted substitution rules.
FAQ
Questions buyers often ask
How should moisture be controlled in paper packaging?
Control warehouse conditions, conditioning time, wrapping, process sequence and inspection because moisture changes can cause curl, cracking, warp and poor adhesion.
What should be written in the specification?
At minimum, define Moisture behaviour, Storage condition, Film and bond, Inspection plan, 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.
Continue building the procurement specification