Which tests should a zipper supplier provide reports for?

Q: Which tests should a zipper supplier provide reports for?

Ask for test reports on the specific construction and finish you are buying, not on a generic zipper. The usual set covers colourfastness to washing, water and rubbing; dimensional change after wash; pull strength and cycle life of the slider; and the restricted substances relevant to the destination market. Reports should name the part tested, the method, the laboratory and the date. A report on a bare metal chain does not cover a plated slider, and a report on a stock tape does not cover a custom dye. Check that the report is recent enough for the buyer's requirement and that the sample described matches your specification. Where a performance figure is quoted, ask for the test condition, because cycle life and pull strength depend on the load and the method. Keep the reports with the approved sample. If a process changes, such as a new plating line or a new tape mill, ask for a new report rather than relying on the old one.