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:
“He could not know my thoughts,
but between us,
the shuttle sped,
passed back,
the invisible web,
bound us....”
—Hilda Doolittle (1886–1961)
“Traveling takes the ink out of one’s pen as well as the cash out of one’s purse.”
—Herman Melville (1819–1891)
“Our children evaluate themselves based on the opinions we have of them. When we use harsh words, biting comments, and a sarcastic tone of voice, we plant the seeds of self-doubt in their developing minds.... Children who receive a steady diet of these types of messages end up feeling powerless, inadequate, and unimportant. They start to believe that they are bad, and that they can never do enough.”
—Stephanie Martson (20th century)