Hero Arts Rubber Stamps Dye Ink, Black Best quick-drying choice for any stamping project Rich colors, perfect for watercolors, markers, and everyday stamping Water-based, acid-free, archival, and fade resistant Coordinates with our Hero Hues line of papers and accessories 3.5"" x 2.25"" ink pad. Hero Hues Dye Ink pads are water-based, archival, acid-free, and fade resistant.