StazOn ink refill is a solvent-based ink designed for use on non-porous surfaces like glass, metal, and plastic, as well as semi-porous surfaces like paper and leather. It's known for its fast-drying, permanent, and smudge-resistant qualities. The ink is acid-free, archival, and provides a transparent, stained-glass appearance. StazOn refills are available in various colors and are used to re-ink StazOn ink pads.