disappearing ink
Spy's secret medium
Disappearing ink is ink that fades or becomes invisible after application, used in novelty items and pranks: He squirted disappearing ink on my shirt.
The ink typically vanishes within minutes as it reacts with air.
Some varieties reappear under certain conditions like heat or UV light, useful for security marking or magic tricks.
- invisibleCannot be seen
- secretConcealed information
- secret messageCovert transmitted information
- top secretHighest classification level
- spyCovert information gatherer
message · hidden · hidden in plain sight · fading · vanishing · disappearing act · lemon juice · heat · reveal · magic · magic trick · trick · prank · practical joke · pen · writing · covert · cipher
- novelty itemswhoopee cushion, rubber chicken, fake vomit, hand buzzer, fake poop
- color-changing thingsmood ring, transition lens, liquid crystal, smart glass
- invisible inkslemon juice, UV ink
disappearing inkpermanent ink
Marking fluid that lasts
permanent marker · indelible ink · India ink · tattoo ink · waterproof ink
disappear, appear, appearance, disappearance, appearing, disappeared, appears, inking, reappear