Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Reexamination Certificate
1999-09-30
2001-02-06
Le, Hoa Van (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
C430S555000, C430S558000
Reexamination Certificate
active
06183945
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a silver halide photographic light sensitive material (hereafter abbreviated as light sensitive material) and an image forming method employing thereof, particularly to a light sensitive material having excellent in fastness of obtained dye image, stability of the image, stability of characteristics after storage, adaptability to rapid processing, and stability of characteristics in case of rapid processing, and the image forming method thereof.
A silver halide photographic light sensitive material has been employed as a material to provide a high quality image with stable quality and low cost. Request for high quality and stable quality by the user is demanded more and more. With reference to the request for high image quality, improvement of color reproduction, reproduction of gradation and sharpness etc. is requested. As for the stable quality, it is necessary to improve stability in manufacturing, fastness during long time storage as unexposed status and characteristics change depending processing condition. Further, high fastness of the obtained image.
In response to the request for high image quality, in recent years, pyrazolotriazole type magenta dye forming coupler has been employed to improve color reproduction. The pyrazolotriazole type magenta dye forming coupler has a problem as the dye produce from the coupler is unfavorable in fastness against light. Improvement has been investigated in both of coupler and dye image stabilizer, for example, a pyrazolotriazole type magenta coupler substituted by secondary or tertiary alkyl etc. disclosed in to Japanese Patent O.P.I. Publication Nos. 61-65245, 61-120146, 61-120147, 61-120148, 61-120149, 61-120150 and 61-120151; a phenol or a phenylether compounds disclosed in Japanese Patent O.P.I. Publication Nos. 56-159644, 59-125732, 61-145552, 60-262159 and 61-90155; amine compounds disclosed in Japanese Patent O.P.I. Publication Nos. 61-73152, 61-72246, 61-189539, 61-189540 and 63-95439 are listed.
However problems arise by employing these techniques, for example, deterioration of film property of photographic composing layer because of increase of oil-soluble component in the layer, deterioration of image quality when stored for long time, increasing fluctuation of photographic property such as sensitivity, gradation and fog caused by storage of unexposed light sensitive material, since the structure of the dye forming coupler is complicated and the molecular weight is large, and large amount of oil-soluble additive must be employed. While it is effective in improving these problems to increase an amount of gelatin as employed binder of the photographic constitution layer, it also derives the lowering the development processing speed, contrary to demand for rapid processing property.
For a photographic light sensitive material such as color paper, particularly employed in direct appreciation it is desired to see a print picture of stable quality immediately, and therefore rapid processing of development processing and reducing quality fluctuation dependent on development processing.
For this purpose, a method making the shape of development tank to slit type, a method of coating or spraying developing processing composition to a surface of the light sensitive material or method heating the light sensitive material just before the development processing. Theses methods are effective in rapid processing and reducing fluctuation depending of change of developing condition, however, it has been made clear that fluctuation of characteristics such as sensitivity and fog increases caused by storage before exposure in case that the light sensitive material employing the pyrazolotriazole type magenta dye forming coupler.
SUMMARY OF THE INVENTION
The present invention has been made in consideration the situation mentioned above, and the object of the invention is to provide a silver halide photographic light sensitive material which is excellent in color reproduction and improved in image storability, particularly image stability under the light exposure. The other object is to provide a silver halide photographic light sensitive material which is improved in stable quality such as stability of characteristics stored before exposure and stability against fluctuation caused by change of processing condition, and an image forming method using it. The further object is to provide a silver halide photographic light sensitive material excellent in adaptability to rapid processing and an image forming method using it.
The silver halide photographic light sensitive material and an image forming method using it, and embodiments thereof are described below.
A silver halide photographic light sensitive material having an emulsion layer containing a yellow dye forming coupler, an emulsion layer containing a magenta dye forming coupler and an emulsion layer containing a cyan dye forming coupler provided on a support, wherein the magenta dye forming coupler is represented by formula (M-1) or (M-1′), and the yellow dye forming coupler is represented by formula (Y-1),
wherein R
M1
represents a hydrogen atom or a substituent, R
M2
and R
M3
represent an alkyl group, and R
M4
and R
M5
represent a hydrogen atom or alkyl group. J
M
represents —O—C(═O)—, —NR
M7
CO— or —NR
M7
SO
2
—, and R
M7
represents a hydrogen atom or alkyl group. R
M6
represents an alkyl, aryl, alkoxy, aryloxy, alkylamino or arylamino group. X
M
represent a hydrogen atom, halogen atom or a group capable of splitting off by reaction with oxidation product of color developing agent,
wherein R
Y1
represents an aliphatic group or an aromatic group, R
Y2
represents a non-diffusable aliphatic or aromatic group, R
Y3
represents halogen atom. X
Y
represents a 5- or 6-member nitrogen containing heterocyclic group splitting off when coupled with an oxidation product of a developing agent.
The emulsion layer containing a yellow dye forming coupler preferably comprises a water-insoluble and organic solvent-soluble polymer.
The number average molecular weight is preferably not more than 200,000, and more preferably 5,000 to 100,000.
The emulsion layer containing a yellow dye forming coupler preferably comprises a compound represented by a formula (A-1),
wherein R
A1
represents a secondary or tertiary alkyl group, R
A2
represents an alkyl group, R
A3
represents a group capable of substituting to the benzene ring, q is an integer of 0 to 3, and plural of R
A3
may be the same or different when q is 2 or more.
In the silver halide photographic light sensitive material a molar ratio MA/MC of silver halide and the magenta dye forming coupler in the silver halide emulsion layer containing the magenta dye forming coupler is preferably 3.1 to 3.7 wherein MA is mols per unit area of silver halide in the silver halide emulsion layer, and MC is mols per unit area of the magenta dye forming coupler in the silver halide emulsion layer.
In another embodiment of the invention, a silver halide photographic light sensitive material having at least one emulsion layer provided on a support, wherein the silver halide emulsion layer comprises a magenta dye forming coupler represented by a formula (M-1) or (M-1′), and a molar ratio MA/MC of silver halide and the magenta dye forming coupler in the silver halide emulsion layer containing the magenta dye forming coupler is 3.1 to 3.7 wherein MA is mols per unit area of silver halide in the silver halide emulsion layer, and MC is mols per unit area of the magenta dye forming coupler in the silver halide emulsion layer.
An image forming method of development processing a silver halide photographic light sensitive material having at least one emulsion layer provided on a support, the image forming method characterized in that at least one of the silver halide emulsion in the silver halide photographic light sensitive material comprises a magenta dye forming coupler represented by a formula (M-1) or (M-1′) wherein processing composition is coated on the silver halide photogr
Hakii Takeshi
Sato Hirokazu
Bierman Jordan B.
Bierman, Muserlian and Lucas
Konica Corporation
Le Hoa Van
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