Made from 10% cotton and 90% bamboo fiber, the Hahnemuhle Bamboo Fine Art Paper 290 gsm 11 x 17-inch 25-Sheet Pack is a smart choice for preparing warm-toned images and monochrome prints. Each page features a matte natural white surface that has a thickness of 19.7 mils, a rated opacity of 99%, and a whiteness rating of 83% for maximum longevity. This paper is acid-free, instant-drying, and buffered with calcium carbonate. Also, this paper has a high water resistance and does not use any optical brightening agents.