17" Heirloom Metal Edge Clamshell Storage Box – Archival Memorabilia & Document Box with PAT-Passed Lignin-Free Board

Protect your memorabilia with this archival-quality metal edge clamshell storage box. Designed for long-term preservation, the one-piece construction features a hinged lid for easy access, while reinforced metal edges provide superior stacking strength and eliminate the need for adhesives that could off-gas over time. Made from 1.5mm blue/grey archival boxboard lined with white lignin-free paper, this storage box is buffered with 3% calcium carbonate, creating an alkaline reserve that guards against migrant acidity and atmospheric pollutants such as sulphur. Ideal for preserving valuable or fragile items, the materials are fully PAT (Photographic Activity Test) passed to ANSI ISO 18916, ensuring safe storage for photographic materials as well. Strong, durable and conservation-safe, this metal edge clamshell box is a reliable solution for museums, archives, libraries and collectors who need trustworthy protection for printed and photographic materials. Approx size 438mm x 292mm x 83mm. (Box contents for illustration purposes only and not included with this item.)