Newspapers record some of our most important personal and collective events and achievements, yet they're very susceptible to damage and deterioration. Newspapers contain lignin, so simply exposing them to air and light can quickly turn them yellow. Storing newspapers folded can also cause permanent damage, so these 3 mil archival polyester sleeves are sized to store various types of newspapers without folding and open on three sides to easily slide your paper inside. Protect your valued memories and historical records for future generations with these archival-quality sleeves from Gaylord Archival, the same boxes used by leading cultural institutions. Made in USA.