Glass surface dissolved by hydrofluoric acid (or ammonium-bifluoride paste) into a uniform matte that scatters light without blocking it. Reads as cool, translucent, soft. Bathroom partitions, lampshades, the diffuser on a high-end pendant, the back of a phone with frosted glass.
HF or NH₄HF₂ (ammonium bifluoride, the safer paste form) chemically attacks SiO₂, leaving a fine micro-pit texture (~1–5 µm) that scatters light isotropically. Resist (vinyl mask, photo-resist, rubber-stencil) defines the etched zone. Etched surface transmits ~70–85% of incident light vs. ~92% for clear float; haze rises from <1% to 60–95%. Compared to sandblast: chemical etch is uniform / soft; sandblast is angular / coarser. Common on architectural privacy glass, lighting diffusers, art glass.
character — soft translucent, smooth to the finger, cool, scatters light without blocking it.
SSPC SP10 surface-prep standards; manufacturer abrasive-blast and etch-chemistry guides.
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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