The convenience of an extra-thick, stable board that eliminates the need for stretching and mounting of watercolour paper. These watercolour boards feature a 100% rag, heavy weight surface paper mounted to an extra heavy weight surface paper mounted to an extra heavy weight core. Uniform surface sizing and internal sizing provides maximum durability for wet on wet techniques, reworking and erasing. Hot Pressed – Extra Heavy Weight – 28ply – 0.135.