invisible ink


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invisible ink

n.
Ink that is colorless and invisible until treated by a chemical, heat, or special light. Also called sympathetic ink.

invisible ink

n
(Chemistry) a liquid used for writing that does not become visible until it has been treated with chemicals, heat, ultraviolet light, etc

invis′ible ink′


n.
a writing fluid that is invisible until treated, as by heat or chemicals.
[1675–85]
Translations
References in classic literature ?
It was not long before I observed that it was the most susceptible part of her face, and that, when she turned pale, that mark altered first, and became a dull, lead-coloured streak, lengthening out to its full extent, like a mark in invisible ink brought to the fire.
If her faithful slate had had the latent qualities of sympathetic paper, and its pencil those of invisible ink, many a little treatise calculated to astonish the pupils would have come bursting through the dry sums in school-time under the warming influence of Miss Peecher's bosom.
These souvenirs, half effaced and almost obliterated by excess of suffering, were revived by the sombre figure which stood before her, as the approach of fire causes letters traced upon white paper with invisible ink, to start out perfectly fresh.
However, recent technological development drives consumer interest from conventional invisible ink to UV fluorescing ink.
The pair, who work for Anderson Group, a marketing firm in Sinking Spring, created an interactive children's book called "Gloria GloFish and the Great Dragon" that requires the reader to use a special flashlight to reveal hidden images printed with invisible ink and 3D glasses that make the drawings pop off the page.
The wall is a page, shadows invisible ink with the heat of breath on it.
Summary: TEHRAN (FNA)- Former Russian spy Sergei Skripal, who is believed to have been poisoned in the UK town of Salisbury in March, twice passed secrets to the UK Secret Intelligence Service MI-6 through books using invisible ink, Daily Mail reported, citing an extract from the upcoming book, The Skripal Files.
Always has been b***s and it remains so Labour frontbencher Barry Gardiner is recorded slating his party's Brexit policy 2018 - the first robot testified before Congress A Twitter user mocks Facebook boss Mark Zuckerberg's appearance before US senators It must have been written in invisible ink. What else could explain this glaring oversight?
"My invitation must have been written in invisible ink. What else could explain this glaring oversight?
If men aren't going to change their attitudes towards women nothing ever changes" Artist Tracey Emin "If the crumb structure is not perfect I am not going on, that is in my rider" Former Great British Bake Off star Mel Giedroyc, whose role in a new production of the musical Company involves her eating a brownie "My invitation must have been written in invisible ink. What else could explain this glaring oversight?