Designed to print limited-edition content, presentations, albums, greeting cards, and for exhibitions, the Hahnemühle Photo Rag® Brt Wht 310 gsm 24 x 39 3-inch core roll guarantees archival standards for all your fine art and photos. It has a moderate amount of OBA content, as well as a thickness of 0.5 mm, an opacity of 99.0%, and a whiteness of 99.5%. Additionally, this calcium carbonate-buffered, acid-free roll is made from 100% pure cotton, which is water-resistant for drying up within an instant.