THERMOSENSITIVE DYESTUFF TRANSFER AGGREGATE

摘要

PROBLEM TO BE SOLVED: To provide a thermosensitive dyestuff transfer aggregate being stable for a hydrolysis and containing an acceptor polymer for re-protonating a transferred deprotonated cationic dyestuff. SOLUTION: The thermosensitive dyestuff transfer aggregate comprises a dyestuff donor element having a dyestuff layer patch containing dyestuff dispersed in a polymer binder and sequentially repeatedly on a support and containing a deprotonated cationic dyestuff becoming a cationic dyestuff at the time of re-protonating and a dyestuff acceptive element containing a polyester polymer having a dye image acceptive polymer layer for not remarkably re-protonating the deprotonated cationic dyestuff to be transferred from the donor element by itself and adding a hydrate of a transition metal salt or metalloid salt of a strong acid on the support. In this case, the acceptive element and the donor element are superposed with one another so as to bring the dyestuff layer into contact with the dyestuff image acceptive polymer layer.