Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Kimie Tachibana

Yutaka Kaneko

Tawara Komamura

Keiji Ohbayashi

Fumio Ishii

Yoshinori Tsubaki

Shunji Suginaka

An ink jet recording medium is disclosed. The recording medium comprises a support and a porous ink absorbing layer comprising inorganic particles and hydrophilic binder which is hardened employing inorganic hardener and organic hardener. The ink jet recording medium exhibits high ink absorbability and desired water resistance without degrading layer brittleness through sufficiently hardening the layer employing an appropriate amount of hardeners.

Ink jet recording medium

A novel cyan dye-forming coupler suitable for color photographic materials is disclosed. The coupler forms a cyan dye images excellent in resistivities to heat and moisture and fastness to light. The coupler has the following a chemical structure of Formula I; ##STR1## wherein X represents a group a group or atom, except hydrogen atom, capable of being split off upon reaction with the oxidized product of a color developing agent; R.sub.1, R.sub.2 and Y individually represent a hydrogen atom or a substituent; n is an integer of zero to 4, provided that the R.sub.2 s may be the same with or different from each other when n is 2, 3 or 4.

Dye forming coupler for photographic use

A novel cyan color-forming coupler for photographic use is disclosed. The coupler has a improved fastness for heat, humidity, and has a chemical structure represented by the following Formula I; ##STR1## wherein Z is a group of non-metal atoms necessary for completing a nitrogen-containing six-member heterocyclic ring condensed with the pyrazole ring. The six-member ring may be substituted or not substituted provided that the six-member ring does not have be condensed with any ring other than the pyrazole ring; R represents a hydrogen atom or a substituent, and X represents a hydrogen atom or a substituent capable of being split off upon reaction with the oxidized product of a color developing agent.

Coupler for photographic use

A silver halide color photographic light-sensitive material containing an improved cyan dye-forming coupler is disclosed. The cyan dye-forming coupler is selected from pyrazoloazole compounds, pyrazolotriazole compounds and benzpyrazolotriazole compound represented by Formulas [I] through [VI] as disclosed in the description.

Silver halide color photographic light-sensitive material

A light-sensitive silver halide color photographic material comprising a support and, provided thereon, a red light-sensitive silver halide emulsion layer containing a novel pyrazoloazole type cyan dye-forming coupler having at least one electron attractive group at a substitutable position except the active site of the coupler for coupling reaction.

Silver halide color photographic light-sensitive material containing

In a heat-developable color photo-sensitive material comprising a support bearing thereon a photographic component layer containing at least a photo-sensitive silver halide, a reducing agent, a binder and a dye-providing material; said heat-developable photo-sensitive material characterized in that at least one of said dye-providing materials is a polymer having a repetition unit being derived from a monomer Formula [I] below: ##STR1## wherein , Q represents an ethylene unsaturated group or a group having an ethylene unsaturated group; Z represents a group of atoms required for forming a nitrogen-containing heterocyclic residual group in which a polymerizable ethylene unsaturated bonding may also be incorporated into the heterocyclic ring, together with a nitrogen atom; R.sub.1 represents an alkyl, aryl, alkylamino, anilino, acylamino or ureido group; Ar represents an aryl group or a heterocyclic residual group; and n is an integer of zero or one.

Growing community of inventors

Hino, Japan

Kimie Tachibana