640gsm heavy weight paper that provides greater strength, double sies texture, 2 different textures in one paper, cold pess surface on one side and hot press on the other, to meet different painting requirement, cold press, the texture is homogeneous with lightly grain, suitable for beginners, hot press, the texture is fine, suitable for creation in detail and realistic works, clear texture, acid free, non fade and withstand repeated erasures, 100% cotton absorb large water, no mounting, painting directly.