Q: How long does zipper sampling take before approval?
Sampling time depends on whether stock or development is involved. A sample built from existing tape, teeth and slider can usually be ready within roughly one to two weeks including courier. A custom tape color adds lab dip and dyeing, commonly two to four weeks. New tooling for a puller or a slider adds a further few weeks, and the first shot may need adjustment. The clock should start when the specification and the reference swatch are confirmed, not when the enquiry is sent. Ask for a written sampling schedule with the lab dip date, the assembly date and the dispatch date. Build in time for one revision, because a first sample often needs a correction to length, finish or puller position. If a seasonal window is tight, request a stock-component sample for fit approval in parallel with the custom sample. Approve the sample in writing against a signed reference, and keep the approved piece sealed as the standard for later lots.