Polyester sewing thread: spun, filament and corespun
Why polyester is the apparel default — 40s/2 versus 20s/2, denier filament tickets, needle-heat limits, and when corespun earns its cost.
Selecting sewing thread: fibre, construction and sewability
Sewing thread is an engineered yarn — spun, corespun or filament, ticket versus tex, Z-twist, and the sewability checks that belong on a BOM.
Zipper sliders and pullers: lock type, gauge match and materials
The slider is a tooled cavity, not a decorative cap — auto-lock versus non-lock, #3/#5/#8 compatibility, zinc bodies and how a puller actually attaches.
Chemical lace versus Raschel lace
When a motif should be embroidered and dissolved, and when a multi-bar warp knit is the honest, cheaper choice.
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.
Drawcords, tapes and aglets
Round cord versus flat tape, waxed cotton, reflective yarns and the tips that stop a hood cord from fraying.
