Invisible Ink Types
For practical reasons, the inks are listed here according to their method of development. It must be understood however that some inks - particularly those of organic origin or those consisting of a mixture of several chemicals - may be made visible by several methods. For example, invisible writing with soap water may be made visible either by heat, reaction with phenolphthalein, viewing under ultraviolet light, or by placing the page inside an iodine fume cupboard.
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Famous quotes containing the words invisible, ink and/or types:
“Some men live with an invisible limp,
stagger, or drag
a leg. Their sons are often angry.”
—Robert Bly (b. 1926)
“Language has not the power to speak what love indites:
The Soul lies buried in the ink that writes.”
—John Clare (1793–1864)
“He types his laboured column—weary drudge!
Senile fudge and solemn:
Spare, editor, to condemn
These dry leaves of his autumn.”
—Robertson Davies (b. 1913)