Heat sensitive recording element and a thermographic method

Details Heat sensitive recording element and a thermographic method Heat sensitive recording element and a thermographic method

C - Chemistry, Metallurgy

07

C

42/3, 260/305.05

C07C 271/28 (2006.01) B41M 5/323 (2006.01) C07D 231/52 (2006.01) G03G 5/09 (2006.01)

Patent

CA 1333398

A thermal imaging method for forming color images is provided which employs as the color image- forming material, a colorless precursor of a preformed image dye possessing at least one thermal protecting group that undergoes fragmentation upon heating and at least one leaving group that undergoes irreversible elimination upon heating, said protecting and leaving groups maintaining the precursor in its colorless form until heat is applied to effect removal of these groups whereby the precursor is converted to an image dye.

605697

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