With a 100% cotton rag base made from a hot press mould, this 25-pack of 8.5 x 11" Smooth Fine Art Paper from Premier Imaging offers photographers and artists a smooth matte surface with a high resolution coating that provides a high D-max and wide color gamut. The 270 gsm paper is made with no optical brightening agents and is both acid & lignin free and alkaline buffered for longevity. Also, it has a thickness of 15 mil and is single-sided. Additionally, it is instant drying and water resistant.