PHOTOSENSITIVE COMPOSITION

PURPOSE:To obtain the excellent printout characteristic of the titled composition by composing the titled composition of a specified trihalomethyl compd., a specified metal allene compd. and an org. dyestuff or a dye precursor capable of changing hue by an acid. CONSTITUTION:The titled composition is composed of the trihalomethyl compd. shown by formula I or II, the metal allene compd. shown by formula III and the org. dyestuff or the dye precursor capable of changing the hue by the acid. In formulas I-III, X is chlorine or bromine atom., A is aryl or a substd. aryl group, etc., (n) is an integer of 0, 1, or 2, (m) and (n) are each an integer of 1 or 2, M is the cation of a metal belonging to IVa, Va and Ib metals, etc. of periodic table, Y is an anion selected from BF4 and PF6 etc., R is pi-allene, R is pi-allene or an anion of pi-allene. Thus, the printout image does not disappear, even in allowing to stand after exposing, and the printout characteristic of the titled composition does not deteriorate, even in case of storing for a long period before exposing the titled composition.