1050 Aluminum Foil (Light Tight)

Al 1050 Light-Tight Aluminum Foil is a pinhole-free variant of 1050 aluminum foil with a minimum aluminum content of 99.5%, manufactured to ensure complete optical opacity across the visible and near-infrared spectrum while retaining the conductivity, formability, and corrosion resistance of the standard 1050 alloy. Electrical conductivity of ~57–59% IACS and thermal conductivity of ~218 W/m·K are maintained relative to standard 1050 foil at equivalent gauge — the light-tight manufacturing process targeting surface continuity rather than bulk composition, and therefore not degrading the conductivity properties governed by the alloy's low solid-solution impurity content. The naturally passivating Al₂O₃ layer and high ductility are preserved across all tempers, supporting precision cutting, wrapping, and enclosure fabrication. Al 1050 light-tight foil is used in photosensitive material packaging, pharmaceutical blister barriers, and laboratory light-exclusion enclosures where pinhole-free construction prevents light-induced degradation and the mechanical properties of 1050 provide adequate barrier strength for handling and storage. The alloy's formability also suits custom enclosure fabrication for optical detector housings, photographic darkroom equipment, and light-sensitive sensor assemblies where opacity, conductivity, and ease of forming must all be achieved in a single material. Al 1050 is a widely studied 1xxx series alloy in research on foil processing and conductivity.