TURNER: This high quality, 100% cotton rag, mould-made watercolor board is natural white, acid free, lightfast & extremely age resistant. These pads are glued & gauzed to ensure flatness when wet. The smooth, slightly irregular surface structure is ideal for professional artists. “William Turner” is suitable for all wet painting techniques: watercolor, lavis, gouache, tempera & acrylic. 300 gsm; 100% rag; matte.