The seamless solid-color countertop material that defined hospital, lab, kitchen, and modern-architecture surfaces from 1967 (the year DuPont introduced Corian) onward. Corian is roughly 1/3 acrylic polymer (PMMA, the same chemistry as Plexiglas) and 2/3 alumina trihydrate filler (a fine white powder that reinforces the polymer and provides flame retardance). The result is a non-porous solid panel that thermoforms (heat-bend into curves), seamlessly joins (panel-to-panel adhesive welds vanish under polish), repairs (sanding restores damaged areas to like-new), and ships in any color the manufacturer's pigment library covers (200+ Corian colors current). The application canon: kitchen countertops, hospital nurse stations, lab benches, retail-store fixtures, hotel bathrooms, modernist furniture pieces (Maarten Van Severen designed in Corian; Karim Rashid, Patricia Urquiola, and Ross Lovegrove all have signature Corian works). Buy through architectural fabricators (Corian-certified); McMaster carries small sample stock.
Polymer-mineral composite, ~30 percent PMMA (polymethyl methacrylate) + ~70 percent alumina trihydrate (ATH, Al(OH)3) by weight, plus pigments and minor additives. Density 1700-1800 kg/m³ (heavier than plain PMMA because of the mineral filler). Tensile strength 35-45 MPa. Flexural strength 60-75 MPa. Elongation at break 0.5-1.0 percent (brittle, like the parent acrylic). Modulus 8-9 GPa. Thermal conductivity 0.5 W/(m·K) (low — the filler does not significantly raise it; the warm hand of solid surface is the thermal property). Coefficient of thermal expansion 35 × 10⁻⁶ /K (relatively high for a solid material; expansion gaps required at long runs). Heat-deflection temperature 70-85 °C — the thermoforming property: heat to 150-180 °C and the panel becomes shape-formable; cool and it locks into the formed geometry. The ATH filler provides flame retardance (the alumina trihydrate releases water on heating, cooling the polymer surface and starving combustion); UL 94 V-0 rating standard. Non-porous (no surface absorption) — the property that makes it the canonical hospital / lab surface; no bacterial harbor. Sanded repair: surface scratches and burns are removed by sanding through 220, 400, 600, 800-grit, then polished — the material is the same color through-thickness, which is what makes the repair work. Joined panel-to-panel with color-matched adhesive (the polymer adhesive cures into a seam invisible to the eye and integral to the panel). Cuts and machines like wood / hard plastic with carbide tooling.
Principled BSDF defaults derived from the sphere matte finish. Reasonable seed for Blender, Substance, Keyshot, Rhino — tune per material. Or grab the whole library at once: ForMaterials library →
# finish: matte albedo #f0ece4 metallic 0.00 roughness 0.75 ior 1.45 transmission 0.00 clearcoat 0.00 sheen 0.00 anisotropic 0.00
{
"albedo": "#f0ece4",
"metallic": 0.0,
"roughness": 0.75,
"ior": 1.45,
"transmission": 0.0,
"clearcoat": 0.0,
"sheen": 0.0,
"anisotropic": 0.0
}
# Blender 4.x — Principled BSDF
# Corian (Solid Surface — Acrylic + Alumina Trihydrate) · finish: matte
import bpy
mat = bpy.data.materials.new(name="mat_corian_solid_surface")
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
bsdf.inputs["Base Color"].default_value = (0.8714, 0.8388, 0.7758, 1.0)
bsdf.inputs["Metallic"].default_value = 0.000
bsdf.inputs["Roughness"].default_value = 0.750
bsdf.inputs["IOR"].default_value = 1.450
bsdf.inputs["Transmission Weight"].default_value = 0.000
bsdf.inputs["Coat Weight"].default_value = 0.000
bsdf.inputs["Sheen Weight"].default_value = 0.000
bsdf.inputs["Anisotropic"].default_value = 0.000
# KeyShot 11+ — lux Python API, Generic material
# Corian (Solid Surface — Acrylic + Alumina Trihydrate) · finish: matte
# Run from Window → Scripting Console
import lux
mat = lux.createMaterial(name="mat_corian_solid_surface", materialType="Generic")
mat.setProperty("diffuse", (240, 236, 228)) # 8-bit sRGB
mat.setProperty("metallic", 0.000)
mat.setProperty("roughness", 0.750)
mat.setProperty("indexOfRefraction", 1.450)
mat.setProperty("transparency", 0.000)
mat.setProperty("coatingWeight", 0.000)
{
"_format": "Substance Designer / Painter \u2014 pbrMetalRough constants",
"_about": "Corian (Solid Surface \u2014 Acrylic + Alumina Trihydrate) \u00b7 finish: matte",
"baseColor": {
"r": 0.8714,
"g": 0.8388,
"b": 0.7758
},
"metallic": 0.0,
"roughness": 0.75,
"ior": 1.45,
"opacity": 1.0,
"anisotropyLevel": 0.0,
"_notes": "Channels listed are the standard Substance pbrMetalRough output. Drop into a Uniform Color node per channel, or as the constant input on a layered stack."
}{
"asset": {
"version": "2.0",
"generator": "ForMatter"
},
"materials": [
{
"name": "mat_corian_solid_surface",
"pbrMetallicRoughness": {
"baseColorFactor": [
0.8714,
0.8388,
0.7758,
1.0
],
"metallicFactor": 0.0,
"roughnessFactor": 0.75
},
"extensions": {
"KHR_materials_ior": {
"ior": 1.45
}
}
}
]
}# USD Preview Surface — UsdShade.MaterialLook prim attributes
# Corian (Solid Surface — Acrylic + Alumina Trihydrate) · finish: matte
def Material "mat_corian_solid_surface" {
token outputs:surface.connect = </mat_corian_solid_surface/PreviewSurface.outputs:surface>
def Shader "PreviewSurface" {
uniform token info:id = "UsdPreviewSurface"
color3f inputs:diffuseColor = (0.8714, 0.8388, 0.7758)
float inputs:metallic = 0.000
float inputs:roughness = 0.750
float inputs:ior = 1.450
float inputs:opacity = 1.000
float inputs:clearcoat = 0.000
token outputs:surface
}
}
The CNC-canonical countertop material. Mills like a hard plastic — clean edges, flame-polishable, seamlessly bondable with two-part adhesive. The signature Corian project: a sink integrated into the countertop with no visible seam.
DuPont Corian fabricator manual; Onsrud Cutter solid-surface feeds & speeds; Corian by DuPont CNC routing guide.
→ try this material in swarfDuPont Corian fabricator-and-care manual.
House vocabulary — terms ForMatter uses with intent.
Materials and processes for people who design and make things.
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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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