Thermal imaging method
AssigneePolaroid Corporation
InventorsAlan L. Borror, Ernest W. Ellis, Donald A. McGowan
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Abstract
A thermal imaging method for forming color images is provided which relies upon the irreversible unimolecular fragmentation of one or more thermally unstable carbamate moieties of an organic compound to effect a visually discernible color shift from colorless to colored, from colored to colorless or from one color to another.
Claims21
A method of thermal imaging which comprises heating imagewise a heat-sensitive element comprising a support carrying at least one layer of an organic compound capable of undergoing an irreversible unimolecular fragmentation of at least one thermally unstable carbamate moiety, said organic compound initially absorbing radiation in the visible or the non-visible region of the electromagnetic spectrum and said imagewise heating effecting said irreversible unimolecular fragmentation of said carbamate moiety whereby the absorption of said organic compound is visibly changed in said layer in an imagewise pattern corresponding to said imagewise heating.
A heat-sensitive element which comprises a support carrying at least one layer of an organic compound capable of undergoing an irreversible unimolecular fragmentation of at least one thermally unstable carbamate moiety, said organic compound initially absorbing radiation in the visible or the non-visible region of the electromagnetic spectrum and undergoing a visible change in absorption upon heating to effect said fragmentation of said carbamate moiety.
Dependencies are inferred from the claim text.