Buyer Guide
T1 Sample Approval Checklist
T1 approval should check dimensions, appearance, assembly fit, material, color, gate marks, defects and correction actions.
Why this matters
T1 approval should check dimensions, appearance, assembly fit, material, color, gate marks, defects and correction actions. T1 approval is a business gate, not just receipt of first samples; the buyer needs dimensions, appearance, material and correction status.
Buyer checks
Check critical dimensions against drawingsInspect appearance, gate marks, flash, sink and scratchesConfirm material, color and surface finishTest assembly fit or functional requirementsConvert defects into a correction log with re-trial status
Quote variables
| Quote variable | Why it changes the mold route |
|---|---|
| Inspection depth | FAI, CMM or basic dimensional checks change cost and timing. |
| Correction rounds | Expected re-trials should be clear before acceptance. |
| Material proof | Resin and color confirmation prevent sample ambiguity. |
| Assembly tests | Fit checks can expose issues not visible in isolated samples. |
Common mistakes
Approving T1 based only on photosFailing to separate acceptable cosmetic marks from correction itemsSkipping material and color confirmation
How to apply it
Use the checklist before authorizing production, export shipment or mold balance payment. If the project is early, the guide can show whether the next move is CAD cleanup, DFM review, prototype tooling, production mold planning, export mold handoff or repair review.