Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Reexamination Certificate
2002-12-17
2003-09-02
Schilling, Richard L. (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
C430S349000, C430S531000, C430S533000, C430S534000, C430S535000, C430S539000, C430S523000, C430S546000, C430S551000, C430S558000, C430S935000
Reexamination Certificate
active
06613502
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2000-168148, filed Jun. 5, 2000, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
The present invention relates to a silver halide color photographic light-sensitive material and, more particularly, to a silver halide color reversal photographic light-sensitive material.
A silver halide color photographic light-sensitive material is usually formed by a coating on a cellulose triacetate support and processed into the form of a product after that. For example, a 135 film is generally wound into a magazine and sealed in a plastic case. Sheet films are stacked (the number of sheets, is 10 in many cases), and cardboards are arranged on the two sides of the stacked films. After that, these sheet films and cardboards are placed in a plastic-laminated, light-shielding paper bag and sealed. A so-called Brownie film is commonly wound together with light-shielding paper and put into a plastic-laminated bag.
Films are thus stored as they are sealed during the period from the manufacture to the time users load them into cameras. Therefore, the storage stability in the form of a product is an important quality.
The storage stability in the sealed state and that in an open system often lead to different results. For example, a volatile organic solvent used in the process of manufacturing a support and a nonvolatile organic solvent used in emulsion dispersion of organic compounds contained in hydrophilic colloid layers such as photosensitive emulsion layers sometimes remain in a light-sensitive material to generate solvent gases which adversely affect the film in a sealed container.
A plastic support used in a light-sensitive material is usually undercoated with gelatin, before photosensitive emulsion layers are coated, for the purposes of, e.g., improving the adhesion between the plastic support and hydrophilic colloid layers of the light-sensitive material. The undercoat solution often contains a water-miscible organic solvent in addition to gelatin and water. As this water-miscible organic solvent, ketones such as acetone are used in some cases. Unfortunately, conventional silver halide color photographic light-sensitive materials, particularly films using 4-equivalent pyrazolone magenta couplers are readily influenced by these residual solvents. Consequently, the photographic properties vary during storage in the form of a product.
The present inventors made extensive studies and have found that this influence of residual solvents is far larger in product forms in which the two surfaces of a plastic support must be undercoated, such as a sheet film and Brownie film, and in a sheet film commonly using a plastic support having a thickness of about 200 &mgr;m, than in a 135 film. Sheet films and Brownie films are often used by professional photographers, so high storage stability has been strongly demanded also in this respect.
In theory, the influence of solvents remaining in the base can be decreased by enhancing drying in the base manufacturing process. However, enhanced drying worsens the brittleness of the base. In practice, therefore, it is an unavoidable problem that solvents remain.
Meanwhile, coloring materials (more specifically, photographic couplers) for giving preferred color hue have been studied in order to improve the color reproduction of a color film. A pyrazolotriazole magenta coupler is widely known as a magenta coupler which causes little side absorption.
Also, base types and undercoating of silver halide photographic light-sensitive materials containing 2-equivalent pyrazolotriazole couplers are described in, e.g., Jpn. Pat. Appln. KOKAI Publication No. (hereinafter referred to as JP-A-)7-64257.
When, however, the present inventors made extensive studies, pyrazolotriazole couplers increased the unevenness produced during coating of photosensitive emulsion layers, compared to the conventionally used pyrazolone-magenta couplers. This unevenness is further conspicuous in relatively large-sized films such as sheet films, so improvements have been desired.
BRIEF SUMMARY OF THE INVENTION
It is an object of the present invention to provide a silver halide color photographic light-sensitive material having high storage stability in the form of a product.
The present inventors made extensive studies to achieve the above object and have found that light-sensitive materials having the following arrangements have high storage stability in the form of a product, thereby completing the present invention.
(1) A silver halide color photographic light-sensitive material having at least one blue-sensitive emulsion layer, at least one green-sensitive emulsion layer, and at least one red-sensitive emulsion layer on a transparent support, wherein the transparent support is a plastic support having two surfaces undercoated with an undercoat solution containing at least one compound selected from the group consisting of a water-miscible organic solvent except for alcohols, a substituted phenol having a molecular weight of 200 or less, and a substituted acetic acid in which at least one hydrogen atom on a methyl group of acetic acid is substituted with a halogen atom, and at least one photosensitive emulsion layer contains a coupler represented by formula (MC-I):
where R
1
represents a hydrogen atom or a substituent, one of G
1
and G
2
represents a carbon atom and the other represents a nitrogen atom, R
2
represents a substituent on one of G
1
and G
2
which is the carbon atom, and R
1
and R
2
may further have substituents, wherein a plurality of the couplers may be bonded together through R
1
or R
2
to form a polymer, or the coupler may be bonded to a polymer chain through R
1
or R
2
.
(2) A silver halide color photographic light-sensitive material having at least one blue-sensitive emulsion layer, at least one green-sensitive emulsion layer, and at least one red-sensitive emulsion layer on a transparent support, wherein the transparent support is a plastic support having a thickness of 150 to 2000 &mgr;m and having at least one surface undercoated with an undercoat solution containing at least one compound selected from the group consisting of a water-miscible organic solvent except for alcohols, a substituted phenol having a molecular weight of 200 or less, and a substituted acetic acid in which at least one hydrogen atom on a methyl group of acetic acid is substituted with a halogen atom, and at least one photosensitive emulsion layer contains a coupler represented by formula (MC-I):
where R
1
represents a hydrogen atom or a substituent, one of G
1
and G
2
represents a carbon atom and the other represents a nitrogen atom, R
2
represents a substituent on one of G
1
and G
2
which is the carbon atom, and R
1
and R
2
may further have substituents, wherein a plurality of the couplers may be bonded together through R
1
or R
2
to form a polymer, or the coupler may be bonded to a polymer chain through R
1
or R
2
.
(3) A silver halide color photographic light-sensitive material having at least one blue-sensitive emulsion layer, at least one green-sensitive emulsion layer, and at least one red-sensitive emulsion layer on a transparent support, wherein the light-sensitive material including the support has an acetone content of 0.05% to 3.0% by weight, and at least one photosensitive emulsion layer contains a coupler represented by formula (MC-I):
where R
1
represents a hydrogen atom or a substituent, one of G
1
and G
2
represents a carbon atom and the other represents a nitrogen atom, R
2
represents a substituent on one of G
1
and G
2
which is the carbon atom, and R
1
and R
2
may further have substituents, wherein a plurality of the couplers may be bonded together through R
1
or R
2
to form a polymer, or the coupler may be bonded to a polymer chain through R
1
or R
2
.
(4). The material according to item (1), wherein the plastic support contains triacetyl cellulose as
Matsuda Naoto
Mikoshiba Hisashi
Fuji Photo Film Co. , Ltd.
Schilling Richard L.
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