MIS Archival Inks are pigment-dye inks that are waterproof and UV-resistant. The pigments in the MIS Archival Inks provide exceptional image/color stability. Each ink has been tested R.I.T., where an image stability of 49 years has been estimated on Somerset Velvet Radiant White. MIS Archival Inks sit higher on the sheet providing deep, rich and forward colors, and achieve approximately 95% of the color gamut of Epson inks. Compatible with Epson inks and require no system flushing prior to use.