Black-and-white photothermographic material
The invention provids a black-and-white photothermographic material comprising a support and an image-forming layer containing a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, and a binder on one side of the support, wherein a hydrophilic binder constitutes 50 mass % or more of the binder. The non-photosensitive organic silver salt contains at least one kind selected from the group consisting of a silver salt of a nitrogen-containing heterocyclic compound and a silver salt of a mercapto compound. The photothermographic material comprises a fluorine compound having a fluorinated alkyl group with at least 2 carbon atoms and at most 12 fluorine atoms.
1 . A black-and-white photothermographic material comprising a support and an image-forming layer containing a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, and a binder on one side of the support,
wherein a hydrophilic binder constitutes 50 mass % or more of the binder,
the non-photosensitive organic silver salt contains at least one kind selected from the group consisting of a silver salt of a nitrogen-containing heterocyclic compound and a silver salt of a mercapto compound; and
the photothermographic material further comprises a fluorine compound having a fluorinated alkyl group with at least 2 carbon atoms and at most 12 fluorine atoms.
2 . The black-and-white photothermographic material of claim 1 , wherein the fluorinated alkyl group is represented by Formula (A):
-Rc-Re—W Formula (A)
wherein Rc resents an alkylene group having 1 to 4 carbon atoms; Re represents a perfluoroalkylene group having 2 to 6 carbon atoms; and W represents a hydrogen atom, a fluorine atom or an alkyl group.
3 . The black-and-white photothermographic material of claim 2 , wherein the fluorine compound has two or more fluorinated alkyl groups represented by formula (A).
4 . The black-and-white photothermographic material of claim 1 , wherein the nitrogen-containing heterocyclic compound is an azole.
5 . The black-and-white photothermographic material of claim 2 , wherein the nitrogen-containing heterocyclic compound is an azole.
6 . The black-and-white photothermographic material of claim 4 , wherein the azole is at least one kind of compound selected from the group consisting of triazole, tetrazole and derivatives thereof.
7 . The black-and-white photothermographic material of claim 5 , wherein the azole is at least one kind of compound selected from the group consisting of triazole, tetrazole and derivatives thereof.
8 . The black-and-white photothermographic material of claim 6 , wherein the triazole is at least one kind of compound selected from the group consisting of benzotriazole and a derivative thereof.
9 . The black-and-white photothermographic material of claim 7 , wherein the triazole is at least one kind of compound selected from the group consisting of benzotriazole and a derivative thereof.
10 . The black-and-white photothermographic material of claim 6 , wherein the tetrazole is at least one kind of compound selected from the group consisting of aryltetrazole and a derivative thereof.
11 . The black-and-white photothermographic material of claim 7 , wherein the tetrazole is at least one kind of compound selected from the group consisting of aryltetrazole and a derivative thereof.
12 . The black-and-white photothermographic material of claim 1 , wherein the mercapto compound is an aliphatic mercapto compound or a heterocyclic mercapto compound.
13 . The black-and-white photothermographic material of claim 2 , wherein the mercapto compound is an aliphatic mercapto compound or a heterocyclic mercapto compound.
14 . The black-and-white photothermographic material of claim 12 , wherein the aliphatic group of the aliphatic mercapto compound is an alkyl group having 10 to 23 carbon atoms.
15 . The black-and-white photothermographic material of claim 13 , wherein the aliphatic group of the aliphatic mercapto compound is an alkyl group having 10 to 23 carbon atoms.
16 . The black-and-white photothermographic material of claim 1 , wherein the reducing agent for silver ions is at least one kind of compound selected from the group consisting of ascorbic acid and a derivative thereof.
17 . The black-and-white photothermographic material of claim 2 , wherein the reducing agent for silver ions is at least one kind of compounds selected from the group consisting of ascorbic acid and a derivative thereof.
18 . The black-and-white photothermographic material of claim 1 , wherein the hydrophilic binder contains at least one kind of compound selected from the group consisting of a gelatin and a derivative thereof.
19 . The black-and-white photothermographic material of claim 2 , wherein the hydrophilic binder contains at least one kind of compound selected from the group consisting of a gelatin and a derivative thereof.