Chemical compliance for trims: REACH, OEKO-TEX, CPSIA and Prop 65
How buttons, snaps, laces and cords actually get tested for the EU and the US — content limits versus release limits, and what a CPC is for.
Tooling a custom zinc trim
DFM for Zamak die-casting: wall thickness, draft, T0 shots and how NRE should appear on a garment-hardware quote.
Testing interlinings: peel, shrinkage and rebound
Bond strength, wash and dry-clean dimensional change, stiffness and strike-back — the lab list that belongs on a fusible, not only a hand iron.
Interlining chemistry: formaldehyde, azo dyes and what OEKO-TEX actually covers
Resin finishes and hot-melts as formaldehyde sources, banned amines, APEO and pH — lining up fusibles with STANDARD 100 classes and REACH.
Fusing parameters and peel strength
Temperature, pressure and time — FZ/T 01085 peel, wash remaining, and the failure modes that look like ‘bad interlining’ but are a press.
Salt spray testing for plated garment hardware
ISO 9227 NSS versus acetic and CASS tests — what white rust and red rust mean on a zipper pull or sew-on, and how many hours to ask for.