Fluid 100 Watercolor Paper is made using traditional paper milling techniques used by the old European masters coupled with modern technology to create a fine watercolor paper that is 100% cotton. Fluid 100 Watercolor paper is natural white and is available in 140lb/300lb in both hot pressed and cold pressed surfaces and in sheets, blocks, rolls and pochettes. Each sheet of paper, block, roll or pochette is strong with a subtle and pleasing surface texture that is acid free and archival. Gelatin sizing gives the artist brilliant color and increased control that is perfect for use with both wet and dry media. Each block has 15 sheets glued on two edges.