Stealth Ink refill [200ml]

Stealth Ink Refill 200ml is a colourless, water-like liquid that stays completely invisible until it reacts with UV light — appearing almost instantly in direct sunshine and more gradually in shaded or indoor spots, settling into a shade ranging from dark brown to black. Extremely permanent on absorbent surfaces and notoriously hard to buff out, this larger bottle is ideal for regular refills or heavier, ongoing use.