How do I check zipper batch traceability?
Traceability links a carton to tape lot, teeth lot, plating batch and assembly date. Test it by tracing one carton before you need the link.
Common questions and professional answers on zippers, apparel trims and sourcing — specs, verification, brand comparison and more.
Traceability links a carton to tape lot, teeth lot, plating batch and assembly date. Test it by tracing one carton before you need the link.
Mix lots only from the same tape dye lot and teeth batch, inside the agreed tolerance; otherwise keep one lot per style or size range.
Nickel release matters because prolonged skin contact can cause sensitisation, and children's skin touches a zipper all day.
Stock-color orders typically ship in 15-25 days; custom dyeing takes 25-35 days, and new tooling can exceed 40 days.
Terms usually combine a deposit with a balance against documents; open account is a credit decision. Agree currency, bank charges and document release.
Corners concentrate stress and are where the tape is most distorted during making-up. A split at a corner usually starts in the seam.
Snagging is usually a construction issue: lining, a seam or a loose thread is caught by the slider or teeth.
Metal zippers add corrosion, plating adhesion and finish checks, with their own strength values and salt spray limits.
Inner packs of a fixed count, a moisture liner, protected sliders and marks that match the packing list are the basics of export packing.
Check the seller's scope certificate, the shipment quantity against certified balances, and confirm the document with the issuing body.
Molded resin zippers are injection-molded acetal (POM) teeth bonded to polyester tape, offering solid color and good wash resistance.
Check documents and lot numbers, sample to AQL, verify length, shade, slider function and stops, and retain a sample per lot.