What T0 and T1 usually mean
T0 is often the first mold trial to check whether the mold can form the part and expose early tooling issues. T1 usually refers to the next trial after mold adjustment, when the supplier checks whether the sample is closer to the agreed standard.
What the first trial checks
The trial checks filling, flash, short shot, sink marks, deformation, ejection, surface condition and major dimensions. For compression molds, the trial also reviews material charge, curing, pressure, temperature and release condition.
Why adjustment is normal
Custom molds often need adjustment after the first samples. The goal is to bring the part closer to the drawing, improve molding stability and solve issues found during inspection. A clear feedback loop makes this stage faster.
What buyers should review
Buyers should check critical dimensions, assembly fit, surface requirements, product function and packaging or production requirements. Feedback should separate must-fix issues from acceptable cosmetic or process details.
From approval to delivery
After sample approval, the mold can be prepared for export or used for molded product production. Before shipment, buyers should confirm mold packing, spare parts, trial records and any operation notes needed by their molding team.