Stealth Ink Marker [20ml]

The Stealth Ink Marker 20ml is a 20mm chisel-tip marker filled with a colourless, water-like ink that stays invisible until it reacts with UV light. It appears almost instantly in direct sunshine and more slowly in shaded spots, settling into a shade from dark brown to black. Very permanent on absorbent surfaces and almost impossible to buff, it’s an easy way to try Stealth Ink before moving up to a larger size.