Machine made from 100% cotton rag, Moab's Entrade Rag Natural 190 Fine Art Paper, available here in a double-sided 13" x 66' roll, offers a spectacular smooth matte surface with a natural white appearance that lends itself to warm black and white prints and soft color prints. This version features a lighter weight of 190 gsm as well as a thickness of 15.5 mil. The natural white tone is achieved by omitting the use of any optical brightening agents and shows with a whiteness of 84%. For longevity, the paper is acid free and calcium carbonate buffered. Additionally, it is water resistant and comes on a 3" core.