Professional grade paper with a rough tooth, sized to withstand repeated washes and scrubbings. The specially treated, neutral pH sheets enhances the brilliance of your watercolors. Has 15 sheets of paper glued together on all four sides and supported with a strong backing. Easy release corner allows you to slide a palette knife between the sheets for clean removal. Paint on each sheet, edge to edge, without having to tape. Details:Deep blue cover with white pagesAvailable in multiple sizes140 lb/ 300 gsm15 sheetsAcid-freeEasy release corners for clean removalRough toothy surfaceCold pressFor use with wet media