The original heavy-duty plant fiber. Hemp (Cannabis sativa industrial varieties — the same plant family as marijuana but bred for fiber not THC, federally legal in the US since the 2018 Farm Bill) was the dominant cordage and sailcloth fiber from antiquity through the early 20th century — the USS Constitution's sails were hemp, every sailing vessel's rigging was hemp, every Continental Army uniform was hemp. The post-1937 Marihuana Tax Act effectively criminalized industrial hemp in the US for 80 years, ceding the canvas / cordage market to cotton and nylon. The 2018 Farm Bill re-legalized industrial hemp at the federal level, and a new generation of hemp canvas, hemp denim, and hemp blends is in development. The fiber is more durable than cotton (3x the tensile strength of cotton fiber), naturally antimicrobial, biodegradable, and grows on roughly 50 percent the water and 0 percent the pesticide input of cotton. Buy hemp canvas from Hempfortex (the dominant US importer/distributor), Rawganique, or specialty sustainable-fashion fabric suppliers.
Plant bast fiber, source Cannabis sativa industrial cultivars (THC content < 0.3 percent per US federal definition). Fiber length 1.5-3 m as harvested, retted (microbial breakdown of pectin to release fibers from stem), processed to spinnable lengths 5-40 cm. Density 1480 kg/m³. Tensile strength 550-1100 MPa fiber (3x cotton). Elongation at break 1-4 percent (low — hemp is stiffer than cotton). Moisture regain 8-12 percent. Fabric weights 200-600 g/m² for canvas grades (lighter for shirting, heavier for industrial canvas / sailcloth). Plain weave the canonical canvas weave; twill and basket weaves available for specialty grades. Antimicrobial property attributed to fiber chemistry (the lignin / pectin matrix in unprocessed fiber inhibits some bacteria); softens with use and washing (the as-woven canvas reads stiff, develops drape and soft hand over weeks of use). Takes natural dyes (indigo, madder, weld) excellently; takes synthetic reactive dyes well. Blends with cotton (canonical 50/50 hemp-cotton chambray), Tencel, organic-cotton-and-hemp denim, and recycled-PET. Sews readily; needle preference is sharp / universal at heavier weights; thread Tex 30-90 depending on fabric weight. Resists rot, mildew, and UV better than cotton — the property that made hemp the historic sailcloth canon.
Principled BSDF defaults derived from the sphere fibrous finish. Reasonable seed for Blender, Substance, Keyshot, Rhino — tune per material. Or grab the whole library at once: ForMaterials library →
# finish: fibrous albedo #c8b888 metallic 0.00 roughness 0.70 ior 1.45 transmission 0.00 clearcoat 0.00 sheen 0.70 anisotropic 0.50
{
"albedo": "#c8b888",
"metallic": 0.0,
"roughness": 0.7,
"ior": 1.45,
"transmission": 0.0,
"clearcoat": 0.0,
"sheen": 0.7,
"anisotropic": 0.5
}
# Blender 4.x — Principled BSDF
# Hemp Canvas (Industrial Hemp Bast-Fiber Plain Weave) · finish: fibrous
import bpy
mat = bpy.data.materials.new(name="mat_hemp_canvas")
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
bsdf.inputs["Base Color"].default_value = (0.5776, 0.4793, 0.2462, 1.0)
bsdf.inputs["Metallic"].default_value = 0.000
bsdf.inputs["Roughness"].default_value = 0.700
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 = 0.700
bsdf.inputs["Anisotropic"].default_value = 0.500
# KeyShot 11+ — lux Python API, Generic material
# Hemp Canvas (Industrial Hemp Bast-Fiber Plain Weave) · finish: fibrous
# Run from Window → Scripting Console
import lux
mat = lux.createMaterial(name="mat_hemp_canvas", materialType="Generic")
mat.setProperty("diffuse", (200, 184, 136)) # 8-bit sRGB
mat.setProperty("metallic", 0.000)
mat.setProperty("roughness", 0.700)
mat.setProperty("indexOfRefraction", 1.450)
mat.setProperty("transparency", 0.000)
mat.setProperty("coatingWeight", 0.000)
{
"_format": "Substance Designer / Painter \u2014 pbrMetalRough constants",
"_about": "Hemp Canvas (Industrial Hemp Bast-Fiber Plain Weave) \u00b7 finish: fibrous",
"baseColor": {
"r": 0.5776,
"g": 0.4793,
"b": 0.2462
},
"metallic": 0.0,
"roughness": 0.7,
"ior": 1.45,
"opacity": 1.0,
"anisotropyLevel": 0.5,
"_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_hemp_canvas",
"pbrMetallicRoughness": {
"baseColorFactor": [
0.5776,
0.4793,
0.2462,
1.0
],
"metallicFactor": 0.0,
"roughnessFactor": 0.7
},
"extensions": {
"KHR_materials_ior": {
"ior": 1.45
},
"KHR_materials_sheen": {
"sheenColorFactor": [
1.0,
1.0,
1.0
],
"sheenRoughnessFactor": 0.7
}
}
}
]
}# USD Preview Surface — UsdShade.MaterialLook prim attributes
# Hemp Canvas (Industrial Hemp Bast-Fiber Plain Weave) · finish: fibrous
def Material "mat_hemp_canvas" {
token outputs:surface.connect = </mat_hemp_canvas/PreviewSurface.outputs:surface>
def Shader "PreviewSurface" {
uniform token info:id = "UsdPreviewSurface"
color3f inputs:diffuseColor = (0.5776, 0.4793, 0.2462)
float inputs:metallic = 0.000
float inputs:roughness = 0.700
float inputs:ior = 1.450
float inputs:opacity = 1.000
float inputs:clearcoat = 0.000
token outputs:surface
}
}
International Hemp Association technical literature; Textile Exchange Material Snapshot Hemp.
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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