Harmony Watercolor Paper Sheets features surface sizing, allowing for corrections on wet paper. Natural-white 140 lb. (300gsm) paper is acid-free, light-resistant, features extreme longevity and is eraser-resistant. Masking fluids or masking tape can be used and removed residue-free. Especially suited for wet painting techniques such as watercolor, glazing, mixed media, gouache, tempera and acrylic. Sheets measure 19.8" x 25.6". Ten sheets per package.