A polymer coating sprayed or dipped onto fabric that lowers surface energy so water beads instead of soaking in. The finish on Gore-Tex shells, Patagonia rain jackets, the polyester pants of every modern hiker. Wears off over washes; refresh with reapplication. Reads as no visible change to the fabric until you watch a drop bead off it.
Two main families: long-chain perfluorocarbon (C8 fluorotelomer) — historically the standard, exceptional performance, but bioaccumulative PFAS concern triggered a phase-out by major brands 2015–2025; short-chain (C6) — interim replacement, less persistent, similar performance; non-fluorinated (C0) — silicone, dendrimer, paraffin-wax based, the 2020s standard for major outdoor brands. Applied by pad-bath / spray / foam at finishing stage; cured at 130–160 °C to crosslink. Performance: contact angle ≥ 110° beading, AATCC 22 spray rating ≥ 90 fresh, drops to 60–70 after 20 washes. Refreshable in home wash cycle (Nikwax TX.Direct, Granger's Performance Repel) — wash, tumble-dry to reactivate. Distinct from waterproof membrane (Gore-Tex, eVent) which is the layer beneath; DWR is the surface treatment that keeps the face fabric from saturating and chilling.
character — no visual change to fabric, water beads off, performance / outdoor register.
SSPC / NACE surface-coating standards; manufacturer technical literature for the specific coating chemistry.
House vocabulary — terms ForMatter uses with intent.
Materials and processes for people who design and make things.
A local-first library of materials, processes, applications, and finishes — equal weight, citable everywhere, so a student can move from "what is this" toward "what's actually buildable here, now, by me." Part of the renato.design ecosystem — sibling of Plenum, Specimen, Ingenue, gesture, graf, and the Renato Rhino plug-ins. Form and matter, inseparable.
Half of teaching materials is teaching how the material is made into the thing. The standard subscription library was always light on that half. The wedge here isn't better samples or a prettier interface — it's treating Process as a peer entity, not a footnote.
Conway, Lefteri, Forty, Sparke, ASM, GIA. Every voice: Voices.
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