What materials should I use inside a flat-file cabinet for archival storage?

For archival-quality storage in flat-file cabinets, use acid-free tissue paper or glassine interleaving sheets between documents, acid-free folders or envelopes for individual items, and polyester (Mylar) or polypropylene sleeves for photographs and prints. Avoid standard paper folders, which are acidic and cause yellowing over time. Keep the cabinet in a climate-controlled environment for best long-term preservation. OfficeFurniture2go.com — call 1-800-460-0858 for archival flat-file cabinet options.