Method and material for the formation of a heat mode image

A method for a forming a heat mode image comprising exposing information-wise by infra-red laser radiation a thermographic material comprising a support and one or more layers comprising one or more of the following components:

• (a) a reducible organic metal salt, (b) polymeric binder, (c) a reducing agent, said one or more layers further comprising an infra-red absorbing compound corresponding to the formula:
• ##STR24## wherein B.sup.1 represents cyano, alkoxycarbonyl, alkyl- or arylcarbonyl or amino carbonyl optionally substituted once or twice at the nitrogen atom by a substituent, the substituent being independently selected in each instance from the group of substituents consisting of alkyl and›/or! aryl;
• B.sup.2 represents arylsulphonyl, alkylsulphonyl, heteroaryl or ##STR25## can be represented by ##STR26## wherein B.sup.3 represent the non-metal atoms to complete a carbocyclic or heterocyclic ring;
• ring T can be substituted by 1 to 3 C.sub.1 -C.sub.4 alkyl groups, n=1 or 2;
• wherein R.sup.44 represents optionally substituted alkyl or aryl or atoms to complete a 5- or 7-membered ring;
• wherein R.sup.47 and R.sup.50 represent hydrogen, alkyl, aryl, cyano, alkoxycarbonyl or the non-metal atoms necessary to form saturated or unsaturated 5- to 7-membered rings between R.sup.47 and respectively X.sub.4 and R.sup.3, and R.sup.50 and respectively X.sub.11 and R.sup.19.

A method for forming a heat mode image comprising exposing information-wise by infra-red laser radiation a thermographic material comprising one or more layers comprising one or more of the following components:

• (a) a reducible organic metal salt, (b) polymeric binder, (c) a reducing agent, said one or more layers further comprising an infra-red absorbing compound corresponding to the formula:
• wherein B.sup.1 represents cyano, alkoxycarbonyl, alkyl- or arylcarbonyl or ##STR27## aminocarbonyl optionally substituted once or twice at the nitrogen atom by a substituent, the substituent being independently selected in each instance from the group of substituents consisting of alkyl and›/or! aryl;
• B.sup.2 represents arylsulphonyl, alkylsulphonyl, heteroaryl or ##STR28## can be represented by ##STR29## wherein B.sup.3 represent the non-metal atoms to complete a carbocyclic or heterocyclic ring;
• ring T can be substituted by 1 to 3 C.sub.1 -C.sub.4 alkyl groups, n=1 or 2;
• wherein R.sup.1, R.sup.2, R.sup.17, R.sup.18 each independently represent hydrogen, C-C8 alkyl, aryl, halogen, cyano, alkoxycarbonyl, optionally substituted aminocarbonyl, amino, monoalkylamino, dialkylamino, hydroxy, alkoxy, aryloxy, alkylthio, arylthio, acyloxy, acylamino, arylamino, alkylcarbonyl, arylcarbonyl or non-metal atoms to complete a cycloaliphatic, aromatic or heterocyclic 5- or 7-membered ring;
• wherein R.sup.33 and R.sup.34 represent, independently of each other, hydrogen, alkyl, aryl, alkoxycarbonyl or together represent the non-metal atoms necessary to close a substituted carbo- or heterocyclic 5- to 7-membered ring;
• R.sup.38 and R.sup.39 each independently represent hydrogen, alkyl, aryl or together the necessary non-metal atoms to complete a cycloaliphatic, aromatic or heterocyclic 5- or 7-membered ring, or independently from each other, the necessary non-metal atoms to complete a cycloaliphatic, aromatic or heterocyclic 5- or 7-membered ring;
• wherein R.sup.46, R.sup.49 represent hydrogen, alkyl, aryl, cyano, alkoxycarbonyl or the non-metal atoms necessary to form saturated or unsaturated 5- to 7-membered rings between R.sup.47 and respectively X.sup.4 and R.sup.3, and R.sup.50 and respectively X.sup.11 and R.sup.19,
• .alpha. is 0 or 1.