Art Spectrum® Acrylic Paper Pad Medium The paper has been manufactured for Acrylic media being internal and external sized enabling the acrylic paint to sit on the surface. Special felts have been used to give the paper a Medium (C/P) texture. Acid Free and Archival making it ideal for students and professional artist alike. 400 gsm Textures is Cold Press Sizes A5, A4 and A3 12 sheet count