This Watercolor Paper is high quality professional grade watercolor paper, which is 100% cotton paper. Produce the best materials for of art and literature to artists. It's carefully for water absorption and durability, made using cold pressing technology,the drum mold machine ensures even distribution of fibers, making the paper very stable, so it not warp or stretch when adding water. It consists of long fibers of 100% cotton, which gives the paper strength, beauty, naturalness, long-lasting whiteness,and that is unparalleled with the look and feel of vintage handmade paper. hey are acid-free, pH neutral, gelatin inside, chlorine-free and air-dried. It allows for superimposed washing and gives it extra strength to prevent erasing and scratching without tearing or shedding. It also allows the removal of paint, whether wet or dry, easily exposing the white color of the paper. Size:37cmx10m (Can crop to any size below 4K) Reference size:4K - 38cmx54cm Specifications:C: Coarse Lines: dries slowly, suitable for painting landscapes Colour:White Material:Cotton pulp Package Contents: 1 x Watercolor Paper Roll Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.