| 摘要 |
<p>Heat developable color-image forming material has a layer containing (a) light-sensitive silver halide grains (b) a redox compound having a hydrophilic releasable dye moiety and a reducing group which, on heating, reduces imagewise exposed silver halide, mobile dye being then released, and (c) a compound which, on heating, releases a base, of a general formula:
<CHEM>
the A groups being H or specified aliphatic or cyclic groups and X being a nucleophilic group.
<??>Compound (C) preferably is 0.01-30 % by weight of the coating(s); 50 compounds are shown, with synthesis examples. Other basic substances or precursors can be present.
<??>Development is by dry heating at 80 DEG -250 DEG C. to form a silver image and dye image which is transferred to unitary or separate fixing layer.
<??>The material has good storage life and gives dye images of high density.</p> |
