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US 2009/0156397 A1Published application
Inks for use on optical recording media
AssigneeHewlett-Packard Development Company, L.P.
InventorsBrian Risch, Michael J. Day, Vladek P. Kasperchik, William Dorogy
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Abstract
An optical recording medium, comprises a substrate, an imaging composition disposed on said substrate, said compound comprising: a matrix, a color-forming agent, and a nucleating agent. The nucleating agent increases the nucleation density of at least one component of the color-forming agent.
Claims15
1-28. (canceled)
A substrate, comprising:
- an imaging composition disposed on the substrate, the composition comprising:
- a ultraviolet curable matrix;
- a leuco dye and a developer, wherein one of the leuco dye and the developer is substantially insoluble in the matrix and the other of the leuco dye and the developer is soluble in the matrix;
- and
- a nucleating agent that increases the nucleation density in said imaging composition of the leuco dye.
2 more elements
A means for a providing human-readable on a substrate, comprising:
- first means for recording human-readable marks on said substrate, said first means including a ultraviolet curable matrix, a leuco dye and a developer, wherein the leuco dye is substantially insoluble in the matrix and the developer is soluble in the matrix to produce a human-detectable optical change in response to an optical signal above a threshold power level and a nucleating agent for decreasing the threshold power level of said leuco dye and a developer by decreasing the particle size of the leuco dye.
Dependencies are inferred from the claim text.