Brilliant Museum Satin Matte Natural Paper 13 X 19", 25 Sheets 25 sheets of 13 x 19" Brilliant Museum Satin Matte Natural fine art inkjet photo paper. Each surface and base was carefully selected to meet the high standards and preferences of the most discriminating fine-art printer. Weight - 300 gsm, Thickness - 19 mils, Opacity - 99%, ISO Brightness - 88.5 Compatibility - dye or pigment based inks