Color-changing marking composition system
First Claim
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1. A color-changing marking composition system comprising:
- (a) a first marking composition comprising a wax, a Leuco dye which changes color when contacted with a color change-inducing compound, and a solvent capable of solubilizing the dye; and
(b) a second marking composition comprising a wax and a color change-inducing compound which induces a color change in the dye when contacted with the dye.
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Abstract
A color-changing marking composition system, suitable for use in the form of crayons and pencils, comprising a first marking composition comprising wax, a Leuco dye capable of changing color upon contact with a color change-inducing compound, and a solvent capable of solubilizing the dye; and a second marking composition comprising wax and a color change-inducing compound, which is capable of inducing a color change in a Leuco dye with which it is brought in contact.
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Citations
20 Claims
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1. A color-changing marking composition system comprising:
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(a) a first marking composition comprising a wax, a Leuco dye which changes color when contacted with a color change-inducing compound, and a solvent capable of solubilizing the dye; and (b) a second marking composition comprising a wax and a color change-inducing compound which induces a color change in the dye when contacted with the dye. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification