Compressed-air abrasive media — silica sand, aluminum oxide, garnet — blasted onto the surface to leave a uniform matte texture. Coarser than bead-blast, intentionally toothy. Reads as deliberate roughness: matte etched glass, weathered-look brass plaque, the textured surface of a tool casting.
Compressed-air abrasive blasting at 60–120 psi with cutting media (aluminum oxide #36–#80, garnet #30–#60) rather than peening media (glass bead). The angular grit cuts material rather than deforming it; the surface becomes a peak-and-valley etch with Ra 2–6 µm. Used for cosmetic texture, paint adhesion prep, mold-release texture, glass etching (frosted-glass effect via mask + blast), and for cleaning oxide / paint off heavy steel. OSHA-restricted silica use in many jurisdictions; aluminum oxide and garnet are the modern defaults.
character — uniform tooth, matte, slightly granular under finger, takes paint with a strong key.
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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