Dry image forming material

Claim 1

A heat-activatable dry image forming material comprising a) and organic silver salt oxidizing agent, b) a reducing agent, and c) a component adapted by heating to interact with the silver ion of (a) to form a photosensitive interaction product, said component consisting essentially of (i) a compound or (ii) a composition which comprises a halogen atom and an organic compound containing at least one element selected from the group consisting of germanium, tin, lead, phosphorus, arsenic, antimony, bismuth, selenium, tellurium and polonium, said compound (i) having the formula ##STR10## wherein R a , R b and R c each independently is (1) a C 1 -C 22 alkyl group, (2) a C 1 -C 22 alkyl group substituted with a carboxyl group, a cyano group, a halogen atom, an aryl group, a hydroxyl group, an amino group, or a mono- or di-(C 1 -C 5 alkyl)amino group (3) a C 5 -C 6 cycloalkyl group, (4) a C 5 -C 6 cycloalkyl group substituted with a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a halogen atom, a hydroxyl group, an amino group, or a mono- or di-(C 1 -C 5 alkyl)amino group, (5) an aryl group (6) an aryl group substituted with a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a halogen atom, a hydroxyl group, an amino group, a mono- or di-(C 1 -C 5 alkyl) amino group, (7) a group of the formula R 1 --R 2 --, (8) a group of the formula R 1 --C.tbd.C--, (9) a group of the formula ##STR11## (10) a group of the formula ##STR12## (11) a group of the formula R 3 --M--, (R 3 ) 2 P-- or (R 3 ) 3 M--, (12) a group of the formula --R 4 --, --R 5 --Y--R 5 -- or --R 5 --R 5 -- which forms 5- or 6- membered ring with Z, wherein R 1 is a hydroxyl group, a C 1 -C 5 alkoxy group, an unsubstituted or substituted 5- or 6- membered heterocyclic group having 16 or less carbon atoms and containing in its ring at least one of oxygen and nitrogen, or a group defined in (1) to (7) above; R 2 is a C 1 -C 4 alkylene group; R 3 is a group as defined in (1) to (7) above; R 4 is a C 4 -C 5 alkylene group unsubstituted or substituted with a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a mono- or di-(C 1 -C 5 alkyl)amino group, an amino group or a hydroxyl group; R 5 is an ethylene group unsubstituted or substituted with a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a mono- or di-(C 1 -C 5 alkyl)amino group, an amino group or a hydroxyl group, or a group of the formula ##STR13## wherein R 7 is hydrogen, a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a mono- or di-(C 1 -C 5 alkyl)amino group, an amino group, a hydroxyl group or a halogen atom; M is tellurium, germanium, tin, lead or silicon; P is phosphorus; Y is oxygen, nitrogen, sulfur, M or ═MX 2 ; and R 6 is a C 1 -C 5 alkyl group; X is chlorine, bromine, or iodine; Z is germanium, tin, lead, phosphorus, arsenic, antimony, bismuth, selenium, tellurium or polonium; and m and n are 0 or a positive integer, and l and p are positive integers provided that in the general formula (I) above, l+m+n+p=3, 4 or 5 and in the general formula (II) above, l+m+n+2=3, 4 or 5; said composition (ii) comprising a halogen atom-containing component and an organic component having the formula (III): ##STR14## wherein R d , R e , R f and R g , each independently is (1) a C 1 -C 22 alkyl group, (2) a C 1 -C 22 alkyl group substituted with a carboxyl group, a cyano group, a halogen group, an aryl group, a hydroxyl group, an amino group, or a mono- or di-(C 1 -C 5 alkyl)amino group (3) a C 5 -C 6 cycloalkyl group, (4) a C 5 -C 6 cycloalkyl group substituted with a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxyl group, a halogen group, a hydroxyl group, an amino group, or a mono- or di-(C 1 -C 5 alkyl)amino group, (5) an aryl group (6) an aryl group substituted with a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a halogen group, a hydroxyl group, an amino group, a mono- or di-(C 1 -C 5 alkyl) amino group, (7) a group of the formula R 1 --R 2 --, (8) a group of the formula R 1 -- C.tbd.C--, (9) a group of the formula ##STR15## (10) a group of the formula ##STR16## (11) a group of the formula R 3 --M--, (R 3 ) 2 P-- or (R 3 ) 3 M--, (12) a group of the formula --R 4 --, --R 5 --Y--R 5 -- or --R 5 --R 5 -- which forms 5- or 6- membered ring with Z; and h is a positive integer, and i, j and k are 0 or a positive integer, provided that h+i+j+k=2, 3 or 4, there being no silver halide present in the material prior to said heating.