Production-Representative Sample Approval Workflow
Every trial begins with a clear technical target. Wherever practical, PetiPaper prepares samples that represent the intended mass-production structure so your team can validate converting performance before final supply standards are locked.
Representative Structure
Base paper, total grammage, PE coating configuration, dimensions, and intended application are aligned with the planned order wherever feasible.
Customer Equipment Validation
Your printing, die-cutting, heat-sealing, forming, curl, leakage, and yield tests provide the operational evidence needed for final confirmation.
Controlled Final Reference
Written technical confirmation together with the approved reference sample governs the final supply standard for the agreed specification.
Eight Controlled Stages
From inquiry parameters to locked production
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1
Input locked for sampling
Stage 01
Requirement & Specification Confirmation
Define the intended application, base paper grade, total grammage, PE weight, single- or double-side coating, roll or sheet dimensions, quantity, destination, packaging, and applicable documentation needs.
Application & forming method Material & coating target Dimensions & packing needs -
2
Structure reviewed
Stage 02
Production-Representative Sample Preparation
Prepare a sample that follows the planned production structure wherever practical. If any sampling limitation or variance is unavoidable, it is identified for technical review before testing begins.
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3
Traceable reference
Stage 03
Sample Identification & Retention
Each sample is identified with key parameters, date, and traceable reference information. A corresponding retained sample and relevant parameter record support later comparison during approval, production, or claims review.
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4
Customer equipment test
Stage 04
Customer Printing & Die-Cutting Tests
Test the sample on your actual equipment for print adhesion, surface performance, die-cut accuracy, flatness, edge condition, and processing yield under normal operating conditions.
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5
Process validation
Stage 05
Heat-Sealing & Forming Tests
Validate heat-seal response, forming stability, curl, leakage resistance, and final container performance at the temperatures, pressures, speeds, and tooling conditions used in your operation.
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6
Evidence-based review
Stage 06
Feedback Review & Technical Adjustment
Share test observations, operating conditions, photos, and measured results. Where an adjustment is technically feasible, the revised parameters are reviewed and a further sample cycle may be arranged before approval.
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7
Approval point
Stage 07
Approved Sample Confirmation
After satisfactory validation, the selected sample is formally confirmed as the approved reference. Both parties align on the corresponding technical details, testing conclusions, and any agreed operating limitations.
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8
Ready for production
Stage 08
Mass-Production Specification Lock-In
The final specification, agreed tolerances, inspection criteria, roll condition, packaging standard, and approved reference sample are locked before trial or mass production. Change control applies to any proposed material or process adjustment.