This is a 40" x 1,000' roll of Archival Tissue from Archival Methods. It is excellent for interleaving prints and drawings and for protecting artifacts. Now that you have that great portfolio assembled, why not add this tissue to prevent the pages from rubbing against each other? This tissue not only adds a layer of protection between images but also lends a touch of professionalism to an already fabulous portfolio. It can also be used for preserving gowns, historic uniforms, and textile items. It is archival grade - acid and lignin-free. It is also thin for easy folding, padding, and crumples without hard edges.