Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Konica-Minolta Holdings, Inc.

Konica Minolta Medical and Graphic, Inc.

Yasushi Usagawa

Nobuaki Kagawa

Shigeto Hirabayashi

Osamu Sasaki

Takeshi Habu

Yasuhiko Kawashima

Katsumi Matsuura

Wataru Fujimatsu

Akira Onodera

Taketoshi Yamada

Fumio Ishii

Kazuhiro Yoshida

Narito Goto

Yasuhiko Takamuki

Akira Onishi

Masato Nishizeki

Yoshiko Ogawa

Akira Ohnishi

Susumu Sudo

A photothermographic imaging material having a support; a photosensitive layer containing photosensitive silver halide particles on one face of the support; and a non-photosensitive layer provided on a side of the support where the photosensitive layer is provided. At least one of the photosensitive layer and the non-photosensitive layer contains an organic silver salt, a reducing agent, a compound represented by the Formula (1) and a compound represented by the Formula (2a). 

Photothermographic imaging material

A photothermographic material having a support provided on at least one side of the support light-sensitive silver halide particles, an organic silver salt and a reducing agent, as well as a leuco dye of a specific structure and a compound of a specific structure.

Photothermographic material

A thermally developable material is disclosed. The material comprises a support both surfaces which are covered with a resin thermal shrinkage ratio of not more than 0.02% at 150&deg; C. for 30 minutes, and an image forming layer comprising an organic silver. The thermally developable material is advantageous in transparent without staining and size repetition accuracy.

Thermally developable material

A method for hardening gelatin comprises the step of mixing gelatin with a compound represented by the following formula (I), (II) or (III): ##STR1## wherein R.sub.1 and R.sub.2 independently represent a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group or R.sub.1 and R.sub.2 combine with each other to form a nitrogen-containing heterocyclic ring; J represents an organic group; 1 represents an integer of 2 to 5; and m represents an integer of 1 to 5.

Method for hardening gelatin and silver halide photographic light

A silver halide photographic light sensitive material contains a novel nucleating compound represented by the following formula (I), which is capable of functioning as a contrast increasing agent in a negative system or as a foggant in a direct positive system ##STR1##

Silver halide photographic light sensitive material

Disclosed is a silver halide photographic light-sensitive material comprising a support having thereon a hydrophilic colloidal layer comprising at least one silver salt of a compound having at least one acid group in the molecule, and the compound is represented by Formula I, Formula II or Formula III: ##STR1## wherein R.sup.1 and R.sup.2 independently represent a hydrogen atom or a group selected from the group consisting of an alkyl group, an alkenyl group, an aryl group and a heterocyclic residue; L.sub.1, L.sub.2, L.sub.3 and L.sub.4 independently represent a methine group; n.sub.1 is an integer of 0 to 3; n.sub.2 is an integer of 0, 1 or 2 and R.sup.3 represents an alkyl group or an alkenyl group. Q.sub.1 represents a non-metal atom group necessary to complete a 5-membered or 6-membered heterocyclic ring; ##STR2## wherein R.sup.4 and R.sup.5 independently represent a hydrogen atom or a group selected from the group consisting of an alkyl group, an alkenyl group, an aryl group, and a heterocyclic residue provided that R.sup.4 and R.sup.5 are not hydrogen atoms at the same time, and Ar represents an aryl group; and ##STR3## wherein R.sup.6 and R.sup.7 independently represent a hydrogen atom or a group selected from the group consisting of an alkyl group, an alkenyl group, an aryl group, and a heterocyclic residue provided that R.sup.6 and R.sup.7 are not hydrogen atoms at the same time; and Ar represents an aryl group.

Silver halide photographic light-sensitive material

A silver halide photographic light-sensitive material containing a dye is disclosed. The dye is represented by a formula ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; R.sub.2 represents a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an acylamino group, an ureide group, an amino group, an acyl group, an alkoxy group, an aryloxy group, a hydroxyl group, a carboxyl group, a cyano group, a sulfamoyl group or a sulfonamide group; B represents a 5- or 6-membered oxygen-containing heterocyclic group or a 6-membered nitrogen-containing heterocyclic group; L.sub.1 through L.sub.3 independently represent a methine group; n represents 0 or 1. The compound of formula 1 has at least one carboxyl group, sulfonamide group or sulfamoyl group.

A silver halide color photographic light-sensitive material is disclosed. The light-sensitive material comprises a support having thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer, and at least one of the silver halide emulsion layers contains a silver salt of dye. The light-sensitive material has a raised sharpness, lowered fog and improved storage stability.

Silver halide color photographic light-sensitive material

A silver halide color photographic light-sensitive material having photographic component layers on a support and at least one layer of which contains a silver salt of dye, is disclosed. The material has properties of high sharpness, high speed, less fogging and excellent raw stock stability.

Disclosed is a silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, a hydrazine compound is contained in said silver emulsion layer or at least one of other layers, wherein said material contains at least one compound represented by Formula I or Formula II, ##STR1## wherein R.sub.1 and R.sub.2 each independently represent an alkyl group, an alkenyl group or an alkynyl group respectively; R.sub.1 and R.sub.2 may form a ring; R.sub.3 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; L.sub.1 represents a divalent linking group; X represents a --[S--L.sub.2 --Y--(L.sub.3)n]-- group or a [--(L.sub.3)n--Y--L.sub.2 --S--]-- group, L.sub.2 represents an alkylene group or an alkenylene group, Y represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, L.sub.3 represents ##STR2## wherein Z.sub.1, Z.sub.2 and Z.sub.3 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; n is an integer of 0 to 1; ##STR3## wherein R4, R5 and R.sub.6 each independently represent an alkyl group, an alkenyl group or an alkynyl group, further Formula II comprises a thioether structure and a --O--Y).sub.l structure, Y represents an alkylene group, an alkenylene group or an arylene group, l is an integer of 2 or more. The silver halide photographic light-sensitive material is capable offering high contrast.

There is disclosed a silver halide photographic light-sensitive material containing a compound represented by the following formula. The photographic material provides sufficiently high contrast images using a stable developer having a low pH value. The photographic material also provides a direct-positive type photographic material improved in image quality and storage stability. ##STR1##

The improved silver halide photographic material contains a novel nucleating compound that is useful either as a contrast increasing agent in light-sensitive material for use in photochemical processes or as a foggant in direct positive light-sensitive materials.

Silver halide photographic materials containing novel nucleating agent

A silver halide photographic light-sensitive material is disclosed. The photographic material contais fine solid particles of a compound represented by a formula of

A silver halide photographic light-sensitive material having a support and provided thereon, at least one silver halide emulsion layer containing Compound [I] or Compound [II] represented by Formula [I] or [II] is disclosed; ##STR1##

Silver halide photographic light-sensitive material capable of providing

Silver halide photographic material having a hydrophilic colloidal layer that contains at least one cyanine dye with a 3H-pyrolopyridine, 4H-thienopyrrole, 6H-thienopyrrole, 4H-furopyrrole or 6H-furopyrrole nucleus which has in its dye molecule at least two acid groups or at least two substituents each having at least one --CH.sub.2 CH.sub.2 OR group (where R is a hydrogen atom or an alkyl group).

Growing community of inventors

Hino, Japan

Yasushi Usagawa