Signage Grade 0.8-3.0mm Thickness Mirror Finish Aluminum Sheet for LED Light Box Billboard Reflectors

This signage grade aluminum sheet is produced from AA1060 refined aluminium with a purity of 99.6 percent or more, then mirror polished on a dedicated line until the surface reflects like glass. A total reflectivity above 86 percent is the reason light box makers specify it: a fraction of the LED output is absorbed at the reflector, so the same driver and the same number of diodes produce a visibly brighter, more even face than a mill finish back panel would allow.

High purity also means high conductivity, so heat from the diodes spreads laterally and dissipates instead of building hot spots that fade vinyl graphics or yellow acrylic diffusers. The sheet is rolled to 0.8–3.0mm with flatness held to 1mm per metre, which keeps large light box faces free of the waviness that shows up badly once a panel is backlit.

Each face carries a removable PE protective film so the mirror survives cutting, drilling and assembly without scratching, and the film peels away cleanly leaving no adhesive residue. Both faces can be supplied mirror, or one face mirror and the reverse brushed, depending on whether the panel is a reflector or a visible decorative trim.

• High Reflectivity: Mirror polished surface reaches 86 percent total reflectivity, lifting light box luminance without adding LED load.
• 99.6 Percent Purity: AA1060 refined aluminium conducts heat away from LED strips and resists the oxidation that dulls lower grades.
• Panel Flatness: Gauge and tension control hold flatness within 1mm per metre so backlit faces stay visually flat across the whole module.
• Protective Film: Removable PE film on both faces shields the mirror through cutting, drilling and installation, then peels without residue.
• Easy Fabrication: Soft, ductile sheet shears, routers, bends and punches with ordinary sign shop tooling and accepts vinyl, ink and adhesive.
• Anodizing Option: Clear or champagne anodized finishes can be supplied for exterior signage that must resist fingerprints and cleaning chemicals.

LED light boxes, edge-lit signs and backlit billboards are the core applications: the mirror face bounces diode light forward through the diffuser, raising brightness and reducing the number of modules needed per square metre. Sign shops also use the sheet for channel letter returns, illuminated pylon cladding and shop fascia trim, where a bright metallic edge is part of the design.

Beyond signage it serves as a reflector in luminaires, solar concentrators, photographic soft boxes and stage lighting, and as a decorative interior panel for lift cars, reception walls and display plinths. Electronics manufacturers specify the same alloy for heat spreader plates and shielding covers because of its conductivity, while packaging machine builders use it for polished guide plates that must stay dimensionally stable.

Sheets are packed with PE film on both faces, interleaved with kraft paper and strapped to a plywood pallet; a 20GP container loads about 20 metric tons when packed in this way. Reflectivity, flatness and surface defect inspection are carried out on a sampling basis under 1000 lux lighting, and the inspection record travels with the mill certificate.

If a panel is damaged during fabrication, replacement sheets can be drawn from the same polishing batch so that reflectivity and tint match exactly. We recommend storing coils and sheets indoors, away from condensation, and removing the protective film within three months of delivery.