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BS EN 1036-1BS EN 12600 (Safety Backed Class 2B2)Approved Document KReviewed Technical Specification

Commercial & Architectural Mirrors

Copper-free silvered reflective surfaces engineered with safety backing and high-humidity corrosion resistance.

Engineering Definition: High-clarity float glass silvered with pure metallic silver, passivated with environmentally friendly copper-free chemical conversion layers, and protected by multi-coat protective polymer backing paints (BS EN 1036-1).
Precision Specification

Composite Architectural Glass Assembly

Multi-Ply Safety Specification

Accessible Static View
10.0mm1.52mm10.0mm

Schematic exploded horizontal cross-section showing sequential structural placement.

01
Outer Structural Ply(Thermally Toughened Glass)
10.0mmExternal impact and wind barrier
02
Engineered Interlayer Core(Structural SentryGlas / Acoustic PVB)
1.52mmViscoelastic damping & residual load support
03
Inner Structural Ply(Thermally Toughened Glass)
10.0mmInterior barrier and post-breakage integrity
BS EN 12150 / BS EN 14449 Architectural ReferenceIllustrative diagram — project structural verification required
Physical & Mechanical Performance Characteristics
Safety Class:Class 2B2 when fitted with cross-linked polypropylene woven safety backing film
Bending Strength:Equivalent to annealed float (fg,k = 45 N/mm²); requires continuous flat substrate support
Thermal Shock Resistance:Standard annealed mirror: ~40°C max temperature difference (do not place behind unshielded cookers)
Fracture Behaviour:Safety backed mirror fractures into adhered shards held securely by structural backing film
Typical U-Value (Ug):5.8 W/m²K (monolithic wall cladding)
Acoustic Reduction (Rw):Rw 29 dB to 31 dB
Max Sheet Dimension:Up to 2440mm × 3660mm (jumbo mirror sheets)
Density & Mass:2.50 kg/m² per mm glass thickness (4mm = 10 kg/m², 6mm = 15 kg/m²)

Key Architectural Advantages

  • •High optical fidelity: low-iron mirror substrate eliminates greenish tint for accurate retail lighting and skin tone rendering
  • •Corrosion endurance: copper-free coating resists black-edge oxidation in high-humidity commercial bathrooms, spas, and gyms
  • •Safety backing prevents flying shards and laceration injury in commercial public washrooms and fitness centers

Critical Engineering Constraints

  • •Standard silvered mirrors CANNOT be thermally toughened after silvering (silver burns off in 620°C furnace)
  • •Must only be mounted with mirror-specific non-corrosive neutral adhesive (solvent-based contact adhesives destroy silver backing)
  • •Substrate wall must be completely dry and flat; uneven adhesive beads cause distorted optical reflection ("funhouse mirror" effect)

Fabrication & Edge Processing Tolerances

Cut After Toughening:Permitted (Cold Cut)
Heat Soak Testing (HST):Not Required
Dimensional Tolerance:Panes <= 2000mm: ±1.5mm; panes > 2000mm: ±2.0mm
Thickness Tolerance:4mm: ±0.2mm; 6mm: ±0.2mm
Flatness & Roller Wave:Max bow 1.5mm/m (high flatness critical to eliminate optical reflection distortion)
Hole & Cutout Geometry Rules:Holes and socket cutouts must be arrissed prior to silvering or drilled with specialized diamond core bits

All hole drilling and socket cut-outs must be deburred and arrissed before mounting.

Structural Design Basis (Eurocodes / BS EN 16612)CEN / BSI Harmonised
Characteristic Strength:Annealed substrate: fg,k = 45 N/mm² (BS EN 572-1)
Elastic Modulus (E):70,000 MPa
Poisson's Ratio (ν):0.22
Linear Expansion (α):9.0 × 10⁻⁶ K⁻¹
Design Bending Stress Formula (BS EN 16612):Requires full continuous mechanical support or continuous neutral-cure mirror adhesive beads

Architectural Specifier Checklist

Verify these technical criteria prior to contract documentation:

1Mandate BS EN 1036-1 compliance to verify copper-free and lead-free environmental formulation.
2Specify Safety Backing Film (BS EN 12600 2B2) for all public, commercial, or accessible locations.
3Specify 100% solvent-free neutral cure mirror adhesive and mechanical bottom J-channels for heavy panels.

Frequent Commercial Applications

Gymnasiums & Dance Studios
Large-format floor-to-ceiling safety-backed 6mm mirrors with polished arrissed edges.
Hotel & Restaurant Washrooms
Integrated LED backlit mirrors, antique bronze mirrors, and demister pad assemblies.
Retail Fitting Rooms & Lift Interiors
High-traffic commercial mirrored wall cladding.
Network Procurement Routing

BuyGlass.co

Commercial cut-to-size glass manufacturing, direct supply, and transactional quoting platform.

Recommended Action: Specify dimensions, edge finish, and safety backing for direct commercial supply.
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Reviewed by: Interior Architectural Specialist, BuyGlass Editorial Panel
Last Standard Verification: 2026-10-30