Fuji Photo Film Company, Limited

Atsuaki Arai

Nobuo Furutachi

Keisuke Shiba

Minoru Yamada

Kotaro Nakamura

Akio Okumura

Mitsugu Tanaka

Kiyoshi Nakazyo

Takeshi Hirose

Yasushi Oishi

Jun Hayashi

Hiroshi Hara

Tadao Shishido

Harumi Katsuyama

Yukio Yokota

Daijiro Nishio

Yoshikazu Fujita

Hisao Suzuki

Seiji Ichijima

Hidefumi Sera

Kunio Ishigaki

Noburo Hibino

Reiichi Ohi

Kozo Inouye

Haruo Ogura

Masasi Ogawa

Kunihira Seto

Takeshi Kato

Atsushi Sugizaki

Kenji Yokoo

Kiyoshin Nakazyo

Katuji Kitatani

A method of hardening gelatin is described comprising treating gelatin with a compound of the formula (I) ##STR1## wherein R.sup.1 and R.sup.2 can each represent a monovalent group including a carbon atom or a nitrogen atom forming a bond together with the nitrogen atom N forming an acid ester in the formula (I); or R.sup.1 and R.sup.2 together can form a heterocyclic ring together with said nitrogen atom N, and

Method of hardening gelatin

A photographic light-sensitive element comprising a support and having thereon at least one silver halide emulsion layer containing an .alpha.-diacylamino substituted (aliphatic acyl) acetamide yellow dye forming coupler and a method for forming yellow dye images which comprises processing a silver halide photographic emulsion with an aromatic primary amino developing agent in the presence of an .alpha.-diacylamino substituted (aliphatic acyl) acetamide compound are disclosed. The coupler is an excellent two-equivalent coupler.

Photographic light sensitive element containing yellow color coupler and

A multilayer color photographic material with improved color reproduction comprising a support having thereon at least two photosensitive silver halide emulsion layers which provide color images having different colors from each other, the multilayer color photographic material containing at least one interlayer color correction coupler as defined hereinafter.

Multilayer color photographic materials utilizing an interlayer

The process of forming a dye image by developing an image-exposed silver halide photographic emulsion layer by an aromatic primary amine color developing agent in the presence of the yellow dye forming coupler shown by the general formula ##STR1## wherein R.sup.1 represents an aromatic group, R.sup.2 represents an aromatic group or a heterocyclic group, and Z represents the non-metallic atom or atoms necessary for forming a 4-membered ring, a 5-membered ring or a 6-membered ring together with ##STR2## in the above formula. A photographic element containing such a yellow-forming coupler.

Process of forming yellow photographic images

A photographic two-equivalent magenta coupler represented by the following general formula (I): ##STR1## wherein [A] represents a magenta color image-forming coupler residue, and the ##STR2## moiety represents a group replacing a hydrogen atom of an active methylene group in coupler [A] wherein Z.sub.a Z.sub.b, Z.sub.c and Z.sub.d, which can be the same or different, each represents a methine group or an --N.dbd. group, and the nitrogen-containing ring formed by Z.sub.a to Z.sub.d may further be substituted with a fused ring, with the proviso that the ##STR3## moiety does not represent a benzotriazolyl-1, benzotriazolyl-2, benzimidazolyl-1 or indazolyl-1 group; a photographic light sensitive material containing the photographic coupler; and a method of forming images using the photographic coupler.

Photographic coupler

A two-equivalent magenta coupler in which the coupling position is substituted with a sulfonamido group, and capable of forming a magenta color image on coupling with an oxidation product of an aromatic primary amine developing agent, and a silver halide color photographic light-sensitive material having at least one silver halide emulsion layer on a support and containing the two-equivalent magenta coupler.

Silver halide emulsion containing two-equivalent magenta coupler

A photographic two-equivalent magenta coupler represented by the following general formula (I): ##STR1## wherein (A) represents a residue of a magenta color image-forming coupler in which one of the hydrogen atoms in the coupling position is eliminated; Q represents an oxygen atom or NH group; and B represents the non-metallic atoms necessary to form a 5-membered or a 6-membered ring containing the nitrogen atom and the ##STR2## group. Color photographic light-sensitive materials containing the two-equivalent magenta coupler are also described.

Silver halide material containing photographic magenta coupler

A color photographic material having on a support at least a photographic emulsion containing an excellent colored coupler represented by the general formula ##STR1## wherein R.sub.1 represents an aryl group or a heterocyclic group; R.sub.2 represents a phenyl group having a halogen atom, an alkoxy group, or an aryloxy group at the ortho-position to the imino group bonded to the 3-position of the pyrazolone ring of the coupler; and R.sub.3 represents a phenyl group having a hydroxyl group at the para-position to the azo group of the coupler; the coupler having a hydrophobic diffusion-resisting group in the molecule thereof.

Color photographic material

A color photographic light-sensitive material containing a coupler therein and, in at least one photographic layer, a compound represented by the following general formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom or an --X--Y group wherein X represents a carbonyl group or a sulfonyl group, and Y represents a straight chain, branched chain or cyclic alkyl group having 1 to 20 carbon atoms, an aryl group, an aralkyl group, an alkoxy group containing a straight chain, branched chain or cyclic alkyl group having 1 to 20 carbon atoms, an aryloxy group, an aralkoxy group, a straight chain, branched chain or cyclic alkoxycarbonyl group having 2 to 20 carbon atoms, an aryloxycarbonyl group or an aralkoxycarbonyl group; and R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom, a straight chain, branched chain or cyclic alkyl group having 1 to 20 carbon atoms, a straight chain, branched chain or cyclic alkoxy group having 1 to 20 carbon atoms, an aryl group, an aryloxy group, an aralkyl group, an aralkoxy group, an alkenyl group, an alkenoxy group, an acylamino group, a halogen atom, an alkylthio group containing a straight chain, branched chain or cyclic alkyl group having 1 to 20 carbon atoms, an aryl group, a diacylamino group, an acyl group having 1 to 20 carbon atoms, a sulfonamido group, a straight chain, a branched chain or cyclic alkylamino group containing a straight chain or branched chain alkyl group having 1 to 20 carbon atoms, a straight chain, branched chain or cyclic alkoxycarbonyl group having 2 to 20 carbon atoms or an acyloxy group having 1 to 20 carbon atoms, provided that R.sub.2, R.sub.3 and R.sub.4 do not simultaneously represent hydrogen atoms.

Color photographic light-sensitive material capable of providing stable

A method for improving the light fastness of a magenta color image in a silver halide color photograph which comprises incorporating into a layer containing a magenta color image, which is formed upon reaction of a magenta coupler and an oxidation product of an aromatic primary amine color developing agent, at least one light fastness improving phenolic compound and at least one synergistic light fastness improving agent selected from a sulfide or sulfoxide compound represented by the following general formula (V):

Method for improving the light fastness of color photographic dye images

A yellow color forming photographic coupler represented by the following general formula (I) ##STR1## in which X represents an aliphatic group, an aromatic group or a heterocyclic group; Y represents a hydrogen atom or a coupling off group; R.sub.1 and R.sub.2 each represents an aliphatic group, or R.sub.1 and R.sub.2 can combine to form a ring; and R.sub.3 and R.sub.4 each represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group.

Silver halide emulsion containing yellow color couplers

A photographic two-equivalent magenta coupler represented by the following general formula (I):

Silver halide emulsion containing two-equivalent coupler

A two-equivalent magenta coupler forming magenta dye images in a color photographic material by a coupling reaction with an oxidation product of a primary aromatic amino color developing agent and having the formula (I) ##STR1## wherein [A] represents a residue of a magenta dye-forming coupler; ##STR2## represents a group which is substituted for one of the hydrogen atoms of the active methylene group of the coupler A; Z represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; B represents a --D-Y residue or an --N Q residue; D represents an oxygen atom, a sulfur atom, or an --NR-- group; R of the --NR-- group represents a hydrogen atom, an alkyl group, or an aryl group; Y represents an alkyl group, an aryl group, or a heterocyclic group; Q of the --N Q residue represents a non-metal atomic group necessary for forming a 5-membered or 6-membered nitrogen-containing heterocyclic group; n is 1 or 2 and when n is 2, B can also represent a --Y group; a color photographic silver halide light-sensitive material comprising a support having thereon at least one silver halide emulsion layer and containing the two-equivalent magnetic coupler having the formula (I); and an image forming method comprising developing an exposed photographic silver halide light-sensitive material comprising a support having thereon at least one silver halide emulsion layer is the presence of the two-equivalent magenta coupler having the formula (I).

Two-equivalent magenta couplers with amido coupling-off groups

A photographic two-equivalent magenta coupler, capable of forming a magenta color image upon coupling reaction with an oxidation product of an aromatic primary amine developing agent, represented by the following general formula I: ##STR1## wherein (A) represents a residue of a magenta color image forming coupler; ##STR2## represents a group which is substituted FOR ONE HYDROGEN ATOM OF THE ACTIVE METHYLENE GROUP IN THE COUPLER A; Z represents an oxygen atom or a sulfur atom; B represents a -- Y group, a -- D -- Y group, or a ##STR3## group; D represents an oxygen atom or an --NR -- group; R represents a hydrogen atom, an alkyl group or an aryl group; Y represents an alkyl group, an aryl group or a heterocyclic group; and Q in the ##STR4## group represents the non-metallic atoms necessary to form a 5-membered or 6-membered nitrogen containing heterocyclic ring; and color photographic light-sensitive materials containing the two equivalent magenta coupler.

A yellow color forming photographic coupler represented by the following general formula (I): ##STR1## wherein Q represents an aliphatic group, an alicyclic group, an aromatic group or a heterocyclic group; Y represents a hydrogen atom, an aliphatic group, an alicyclic group, an aromatic group or a heterocyclic group; R represents a divalent aliphatic group, a divalent alicyclic group, a divalent aromatic group or a divalent heterocyclic group; and Z represents an oxygen atom, a sulfur atom or a nitrogen atom substituted with an electron attracting group.

Growing community of inventors

Minami-ashigara, Japan

Atsuaki Arai