Independent buyer resource Evidence before approval No supplier network claims

T1 Sample Review Checklist: A Printable Buyer Worksheet

Buyer guide Independent resource 4 min read Reviewed by the PlasticsTechnologyAlliance.com editorial team Updated June 2026

T1 samples deserve a structured review, not a glance and a gut call. This worksheet turns the mold trial guide into a checkable routine: work through it with the samples, the drawing, and the supplier’s trial report in front of you, and the approval decision largely writes itself. Use the T1 sample defect map explainer to connect each finding to evidence, ownership, and closure status. When incomplete fill and flash appear together, use the short shot and flash T1 review explainer to frame the evidence request before approval. Print this checklist or copy it into your program file—one sheet per trial. If you’d rather answer questions and get a structured recommendation, the T1 Review Assistant walks the same logic interactively.

Before You Look at Parts

  • Trial identified: tool number, T-stage (T1/T2/…), date, press, cavity count
  • Supplier’s dimensional report received (measured against the drawing, critical dimensions at minimum)
  • Supplier’s process record received (the conditions these samples were molded under)
  • Supplier’s issues list received (their findings, not just yours)
  • Approved drawing revision confirmed—the samples are measured against the right version
  • Material confirmed: resin grade and color as specified (CoA if required)

A trial without the documents is a parts viewing, not a review. Ask for the paperwork first.

Visual / Defect Walkthrough

Check each, per cavity where applicable. Log findings in the Defect Log Template:

Dimensional & Function

  • Critical dimensions reviewed against the dimensional report — misses listed with the correction plan
  • Cavity-to-cavity consistency reviewed (multi-cavity tools: per-cavity data)
  • Fit/assembly trial done where mating parts exist
  • Loaded features (clips, bosses) flex/torque-checked on actual samples

Process & Cycle

  • Demonstrated cycle time vs quoted cycle — gap explained
  • Ejection unassisted (no hand-pulling, no continuous release spray)
  • Process record complete enough to reproduce the run

The Decision

  • Approve — findings minor, documented, with standards updated
  • Approve with conditions — corrections listed, owners and verification dates set, next trial scheduled
  • Hold — structural findings (cracks, voids in loaded bosses), unexplained variation, or missing documents

Record the decision, the conditions, and who signed. Gate borderline calls with the Mold Approval Risk Checklist.

Evidence Box

This buyer review note was developed from recurring shop-floor troubleshooting patterns, injection molding process principles, and buyer-side mold trial review logic. Where specific technical claims affect supplier evaluation, material handling, tooling decisions, or production approval, they should be verified against the actual mold design, material grade, supplier processing guide, process sheet, and sample inspection data.

This page is a buyer-side review aid, not a final engineering diagnosis, supplier certification, or guaranteed fix.

Disclaimer

PlasticsTechnologyAlliance.com is an independent buyer resource. This checklist supports—but does not replace—your quality procedures and your supplier’s engineering review. Adapt items to your part, industry, and risk level.

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