A cured concrete slab ground through a sequence of diamond pads from coarse to fine, then chemically densified — the surface comes out as a hard, slightly translucent, mirror-bright concrete floor. Standard finish on big-box retail (Apple Stores, Whole Foods), modern industrial offices, gallery spaces. Reads as deeply contemporary; the bare slab elevated.
Mechanical grind sequence: 50 / 100 / 200 / 400 / 800 / 1500 / 3000-grit metal-bond and resin-bond diamond pads on a planetary floor grinder. Between 200 and 400-grit, lithium silicate or sodium silicate densifier applied — penetrates the surface, reacts with calcium hydroxide in the cement, hardens the top 1–3 mm. Final pass with 3000-grit and a guard sealer. Surface roughness Ra ≤ 0.1 µm; gloss ≥ 75 GU at 60°. CSI Class 3 (light reflection) to Class 4 (mirror). Hard, abrasion-resistant, low-maintenance — the floor IS the finish, no overlay product. Common spec for retail, office, museum, modern residential. Distinct from concrete-floor coatings (epoxy, urethane) — polished concrete is the slab itself, ground.
character — mirror concrete, slightly translucent at depth, contemporary-architectural register.
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, with cost-over-volume curves, trade-off profiles, equipment-tier filters, and second-life paths layered onto the data 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's Material World on raw materials, Lefteri's Making It on processes, Forty's Concrete and Culture, Sparke's Design in Context, Bürdek's Design: History, Theory and Practice of Product Design, Schröpfer's Material Design on materials in architecture, Winchester's The Perfectionists on tolerance, Minshall's Your Life Is Manufactured on the global supply chain, von Busch's Making Trouble on material activism, Were's How Materials Matter, Hegger / Drexler / Zeumer's Basics Materials, Untracht and McCreight on metalsmithing, USDA Forest Products Lab on woods, GIA on gemstones, Schott / CoorsTek / Toray / Owens Corning datasheets, MakeItFrom for verifiable property numbers, ASM Handbook, ISO standards. Museum holdings draw from the Met, MAD, V&A, Smithsonian American Art Museum, Newark Museum of Art, British Museum, Heard Museum, Smithsonian NMAI, Eiteljorg Museum, Philadelphia Museum of Art, Cranbrook Art Museum, and Grand Rapids Art Museum — collection-record permalinks only, designer overview pages and exhibition listings excluded. Voice blocks now ride on every entry kind — material, process, application, and finish — and include Ruskin on iron, Anni Albers on twining, Greg Lynn on the shred-and-teeth NURBS lineage, Pugin on the metal that won't be hammered, Barthes / Yanagi / Benjamin channeled within their philosophy; Sparke, Bürdek, Forty, Conway, Schröpfer, Minshall, von Busch, Lefteri, Pat Pruitt, Mary Lee Hu, Tom Joyce, Albert Paley, and the rest of the contemporary makers quoted verbatim with citation. All cited.
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