This 25-sheet pack of 13 x 19" Photo Silk Baryta 310 Inkjet Paper from Hahnemuhle is a white, silk gloss baryta inkjet photo paper with a 100% alpha cellulose base. It has a basis weight of 310gsm and a thickness of 12.3mil. Photo Silk Baryta has good whiteness and brightness with both at 95% and features a gloss level of 15% at 60°. It is both acid-free and calcium carbonate buffered to enhanced longevity and also has a very low amount of optical brightening content. Additionally, Photo Silk Baryta has very good drying characteristics and a good water resistance for durability.