The safety glass of every car windshield, every store-front entry door, every overhead sky-light, every building application where breakage must keep the glass in the frame rather than falling free. Laminated glass is two (or more) sheets of float glass with a tough plastic interlayer (polyvinyl butyral, PVB) between them, heat-and-pressure-bonded so they act as a single composite panel. When the glass breaks, the fragments stay stuck to the PVB interlayer — the windshield 'spider-web' pattern is exactly this: the glass has shattered but the PVB is holding it. Used wherever fall-out is the failure mode (windshields, overhead glazing, balcony glass, hurricane-resistant facades). The PVB interlayer also blocks UV and damps acoustic transmission, making laminated glass the standard for premium soundproof and museum glazing. SGP (SentryGlas Plus, ionoplast interlayer) is the stronger / more rigid alternative for structural laminations.
Two or more plies of float glass (typically 3-12 mm each) bonded with a polyvinyl butyral (PVB) interlayer (typically 0.38, 0.76, or 1.52 mm thick — the 0.76 mm is the automotive standard, 1.52 mm for structural / hurricane). Lamination process: PVB film cut to glass dimensions, layup in clean room, vacuum nip-roll de-airing, autoclave at ~140 °C and ~13 bar for 1-2 hours. The result is an optically clear composite that bends as one panel under load. PVB interlayer is the engineered safety property — Young's modulus 8-15 MPa at room temperature (drops sharply above 30 °C, which is why hot cars feel softer in laminated glass), tensile elongation at break > 200 percent. Failure mode: glass cracks but fragments stay attached to PVB; the panel can typically remain in frame and provide residual fall-out protection. Heavier laminates (multiple thick plies + multiple PVB layers) provide bullet resistance per UL 752 ratings (Level 1-8) and blast resistance per ASTM F2912. SentryGlas Plus (SGP) is an ionoplast interlayer alternative — 5x stiffer than PVB at room temperature and 100x stiffer at high temperature, used for structural laminated glass (glass beams, glass floor panels) where load transfer matters more than the safety-glazing property.
Structural laminated glass, composed of three sheets of chemically tempered glass and layers of polymer film, is used for all five surfaces of the box and allows views unobstructed by structural members or opaque floors.
Principled BSDF defaults derived from the sphere transparent finish. Reasonable seed for Blender, Substance, Keyshot, Rhino — tune per material. Or grab the whole library at once: ForMaterials library →
# finish: transparent albedo #d8e8e8 metallic 0.00 roughness 0.05 ior 1.50 transmission 1.00 clearcoat 0.00 sheen 0.00 anisotropic 0.00 thickness 1.00 attenuation_distance 0.60
{
"albedo": "#d8e8e8",
"metallic": 0.0,
"roughness": 0.05,
"ior": 1.5,
"transmission": 1.0,
"clearcoat": 0.0,
"sheen": 0.0,
"anisotropic": 0.0,
"thickness": 1.0,
"attenuation_distance": 0.6
}
# Blender 4.x — Principled BSDF
# Laminated Safety Glass (PVB-Bonded Sandwich) · finish: transparent
import bpy
mat = bpy.data.materials.new(name="mat_glass_laminated_safety")
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
bsdf.inputs["Base Color"].default_value = (0.6867, 0.807, 0.807, 1.0)
bsdf.inputs["Metallic"].default_value = 0.000
bsdf.inputs["Roughness"].default_value = 0.050
bsdf.inputs["IOR"].default_value = 1.500
bsdf.inputs["Transmission Weight"].default_value = 1.000
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
# Laminated Safety Glass (PVB-Bonded Sandwich) · finish: transparent
# Run from Window → Scripting Console
import lux
mat = lux.createMaterial(name="mat_glass_laminated_safety", materialType="Generic")
mat.setProperty("diffuse", (216, 232, 232)) # 8-bit sRGB
mat.setProperty("metallic", 0.000)
mat.setProperty("roughness", 0.050)
mat.setProperty("indexOfRefraction", 1.500)
mat.setProperty("transparency", 1.000)
mat.setProperty("coatingWeight", 0.000)
{
"_format": "Substance Designer / Painter \u2014 pbrMetalRough constants",
"_about": "Laminated Safety Glass (PVB-Bonded Sandwich) \u00b7 finish: transparent",
"baseColor": {
"r": 0.6867,
"g": 0.807,
"b": 0.807
},
"metallic": 0.0,
"roughness": 0.05,
"ior": 1.5,
"opacity": 0.0,
"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_glass_laminated_safety",
"pbrMetallicRoughness": {
"baseColorFactor": [
0.6867,
0.807,
0.807,
1.0
],
"metallicFactor": 0.0,
"roughnessFactor": 0.05
},
"extensions": {
"KHR_materials_transmission": {
"transmissionFactor": 1.0
}
}
}
]
}# USD Preview Surface — UsdShade.MaterialLook prim attributes
# Laminated Safety Glass (PVB-Bonded Sandwich) · finish: transparent
def Material "mat_glass_laminated_safety" {
token outputs:surface.connect = </mat_glass_laminated_safety/PreviewSurface.outputs:surface>
def Shader "PreviewSurface" {
uniform token info:id = "UsdPreviewSurface"
color3f inputs:diffuseColor = (0.6867, 0.807, 0.807)
float inputs:metallic = 0.000
float inputs:roughness = 0.050
float inputs:ior = 1.500
float inputs:opacity = 0.000
float inputs:clearcoat = 0.000
token outputs:surface
}
}
ANSI Z97.1 / CPSC 16 CFR 1201; Eastman Saflex / Kuraray Trosifol PVB technical literature.
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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