Q: What is the standard zipper sample approval process?
The usual process has four steps. First, the buyer issues a specification: tape colour reference, chain type, size, length, slider and puller, finish, and any performance requirement. Second, the supplier makes a sample and sends it with a measurement sheet and the material details. Third, the buyer checks appearance under a stated light source, measures length and width, operates the slider, and confirms the puller attachment. Fourth, the buyer signs the sample or returns comments. A signed sample becomes the golden reference and should be sealed and stored by both sides. Approval should state what is approved: colour, construction, finish and packing. A common mistake is to approve a photo; a photo cannot show hand-feel, gloss or the exact shade. Keep a record of the approval date, the signatory and the revision number. Any later change to tape, finish or slider should trigger a new sample and a new approval, otherwise the reference no longer controls production.