Coarse rock salt scattered over wet concrete and pressed in; once cured, the slab is rinsed and the salt dissolves out, leaving a uniform pitted surface. Reads as soft, irregular, slightly archaic. Pool decks, patio surrounds, walkways where slip-resistance and visual texture both matter.
After the final float, coarse rock salt (3–10 mm crystals) is broadcast across the surface and pressed in with a roller. Concrete is allowed to set; once hard, surface is wet-rinsed and the salt dissolves out, leaving 2–5 mm-deep pits where each crystal sat. Slip-resistance R-10 to R-11. Cost slightly higher than broom-finish (extra material + extra step), lower than exposed aggregate. Common on swimming-pool decks, garden patios, mid-tier residential walkways. Avoid in freeze-thaw climates without sealer — pitted surface holds water.
character — irregular pitted texture, soft archaic register, slip-resistant.
Marble Institute of America / Natural Stone Institute care-and-finish guides; ASTM C1242 dimension stone terminology.
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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