Canson Infinity Rag Photographique Fine Art Paper, 310 Gram, 13 x 19 Inch, 25 Sheets 100 percent cotton rag, white, photographic paper with an ultra smooth texture The whiteness is controlled with natural white pigments to ensure the highest archival standards and age resistance Internally buffered, acid free, and museum grade 310 gram, 25 sheets of 13 x 19 inch per box, and contains no OBAs (optical brightening agents) All Canson Infinity ICC profiles are available on Canson-Infinity website.