11 mil Iridium Photo Paper is a microporous, SUPERDRY true photo paper made from a high quality, heavy-weight opaque white base, It is a premium photo paper with an extended color gamut and satin finish. It dries instantly, uses dye, pigment and solvent inks, and laminates extremely well. Iridium is Sihl's highest quality photo paper for the most discriminating customer Dye and UV Inks