Zipper export and compliance: REACH, nickel, kids and the US
A zipper is several homogeneous materials — tape, elements, slider, coating — and each one can fail REACH, CPSIA or a brand RSL on its own.
Zipper defects and complaints: burst chain, jammed slider, lost stops
The failures buyers actually receive — split chain, hard running, missing teeth, pulled stops, stained tape — and which ones are mill, sewing or laundry.
Quality standards that actually apply to trims
GB, FZ, QB, ISO, ASTM and EN numbers buyers should put on a trim spec — attachment strength, sharpness, zippers and children’s small parts.
Zinc, brass, steel and aluminium in apparel hardware
Which alloy belongs in a sew-on, a snap, an eyelet or a die-cast logo — and why “metal” is not a specification.
Zippers in garment engineering: chain, placement and pattern
Closed versus separating, coil versus metal versus POM, and where the zipper actually sits — fly, placket, pocket, detachable lining and design line.
Zipper testing: chain strength, stops, lock and cycling
QB/T 2171–2173 and ASTM D2061 in buyer language — lateral strength, top and bottom stop, slider lock, and why a cycle test is not a look-see.
