Photothermographic material and image forming method

An image forming method comprising:

• exposing imagewise a photothermographic material which has, on at least one side of a support, an image forming layer comprising at least a photosensitive silver halide, a non-photosensitive organic silver salt, and a reducing agent for the organic silver salt, and at least one non-photosensitive layer, and which contains a water-soluble magenta dye having a hue angle of 280° to 360° or 0° to 60°;
• the water-soluble magenta dye being represented by the following Formula (III):
• wherein in Formula (III), R9 represents one selected from, a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, cyano, —OR11, —SR12, —CO2R13, —OCOR14, —NR15R16, —CONR17R18, —SO2R19, —SO2NR20R21, —NR22CONR23R24, —NR25CO2R26, —COR27, —NR28COR29, and —NR30SO2NR31, and R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30 and R31 each independently represent one selected from a hydrogen atom, an aliphatic group, and an aromatic group;
• Z represents a group of atoms forming a 5 or 6-membered nitrogen-containing heterocycle, which may be substituted by at least one of an aliphatic group, an aromatic group, a heterocyclic group, cyano, —OR111, —SR112, —CO2R113, —OCOR114, —NR115R116, —CONR117R118, —SO2R119, —SO2NR120R121, —NR122CONR123R124, —NR125CO2R126, —COR127, —NR128COR129, and —NR130SO2NR131, and this heterocycle may further form a condensed ring with another ring;
• R111, R112, R113, R114, R115, R116, R117, R118, R119, R120, R121, R122, R123, R124, R125, R126, R127, R128, R129, R130, and R131 each independently represent one selected from a hydrogen atom, an aliphatic group, and an aromatic group;
• A represents one selected from —NR4R5 and a hydroxy group, R4 and R5 each independently representing one selected from a hydrogen atom, an aliphatic group, an aromatic group and a heterocyclic group:
• B1 represents one selected from ═C(R6)— and ═N—:
• B2 represents one selected from —C(R7)═ and —N═;
• R2, R3, R6 and R7 each independently representing one selected from a hydrogen atom, a haloaen atom, an aliphatic group, an aromatic group, a heterocyclic group, cyano, —OR51, —SR52, —CO2R53, —OCOR54, —NR55R56, —CONR57R58, —SO2R59, —SO2NR60R61, —NR62CONR63R64, —NR65CO2R66, —COR67, —NR68COR69 and —NR70SO2NR71, and R51, R52, R53, R54, R55, R56, R57, R58, R59, R60, R61, R62, R63, R64, R65, R66, R67, R68, R69, R70 and R71 each independently represent one selected from a hydrogen atom, an aliphatic group and an aromatic group;
• and at least one of Z, R2, R3, R9, B1, B2 and A contains a water-soluble group;
• and thermally developing the photothermographic material by heating for a period of from 1 second to 14 seconds.

A photothermographic material comprising, on at least one side of a support, an image forming layer comprising at least a photosensitive silver halide, a non-photosensitive organic silver salt, and a reducing agent for the organic silver salt, and at least one non-photosensitive layer, wherein the photothermographic material contains a water-soluble magenta dye represented by the following Formula (IV):

• wherein in Formula (IV), R2, R3, R6 and R7 each independently representing one selected from a hydrogen atom, a halogen atom, an aliphatic group, an aromatic group, a heterocyclic group, cyano, —OR51, —SR52, —CO2R53, —OCOR54, —NR55R56, —CONR57R58, —SO2R59, —SO2NR60R61, —NR62CONR63R64, —NR65CO2R66, —COR67, —NR68COR69 and —NR70SO2NR71, and R51, R52, R53, R54, R55, R56, R57, R58, R59, R60, R61, R62, R63, R64, R65, R66, R67, R68, R69, R70 and R71 each independently represent one selected from a hydrogen atom, an aliphatic group and an aromatic group;
• R4 and R5 each independently representing one selected from a hydrogen atom, an aliphatic group, an aromatic group and a heterocyclic group;
• R9 has the same meaning as defined in Formula (III);
• X1 and X2 each independently represent one selected from —C(R10)═ and —N═;
• R10 represents one selected from a hydrogen atom, an aliphatic group, and an aromatic group;
• one of X1 and X2 is —N═, X1 and X2 not being —N═ at the same time;
• at least one of R2, R3, R4, R5, R6, R7, R9, X1, and X2 contains a water-soluble group.

An image forming method comprising:

• exposing imagewise a photothermographic material which has, on at least one side of a support, an image forming layer comprising at least a photosensitive silver halide, a non-photosensitive organic silver salt, and a reducing agent for the organic silver salt, and at least one non-photosensitive layer, and which contains a water-soluble magenta dye having a hue angle of 280° to 360° or 0° to 60°;
• the water-soluble magenta dye being represented by the following Formula (IV):
• wherein in Formula (IV), R2, R3, R6 and R7 each independently representing one selected from a hydrogen atom, a halogen atom, an aliphatic group, an aromatic group, a heterocyclic group, cyano, —OR51, —SR52, —CO2R53, —OCOR54, —NR55R56, —CONR57R58, —SO2R59, —SO2NR60R61, —NR62CONR63R64, —NR65CO2R66, —COR67, —NR68COR69 and —NR70SO2NR71, and R51, R52, R53, R54, R55, R56, R57, R58, R59, R60, R61, R62, R63, R64, R65, R66, R67, R68, R69, R70 and R71 each independently represent one selected from a hydrogen atom, an aliphatic group and an aromatic group;
• R4 and R5 each independently representing one selected from a hydrogen atom, an aliphatic group, an aromatic group and a heterocyclic group;
• R9 has the same meaning as defined in Formula (III);
• X1 and X2 each independently represent one selected from —C(R10)═ and —N═;
• R10 represents one selected from a hydrogen atom, an aliphatic group, and an aromatic group;
• one of X1 and X2 is —N═, X1 and X2 not being —N═ at the same time;
• at least one of R2, R3, R4, R5, R6, R7, R9, X1, and X2 contains a water-soluble group;
• and thermally developing the photothermographic material by heating for a period of from 1 second to 14 seconds.