Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Reexamination Certificate
2000-11-09
2002-08-27
Letscher, Geraldine (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
C430S378000, C430S567000, C430S502000, C430S505000, C430S558000
Reexamination Certificate
active
06440650
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 11-319800, filed Nov. 10, 1999, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
The present invention relates to a silver halide color reversal photographic lightsensitive material, hereinafter photographic lightsensitive material is also referred to as “photosensitive material”, and a color image forming method using the same.
Color reversal films are transmitting materials, have high picturing capacity and good color reproduction resulting from a wide density dynamic range (common color reversal films are designed to have a transmission density of 3.0 or more in standard processing), and have high resolving power based on high graininess-sharpness. Hence, color reversal films are extensively used in various purposes from printing to color photographs requiring high quality. A development process of color reversal film photosensitive materials includes first development—reversal processing—color development, and a subsequent desilvering step. Compared to other color image forming methods (e.g., color paper and color negative films), the replenisher volume of a processing solution in the development step is larger, and the time of this processing step is longer.
To reduce the development time (e.g., the time of color development), a silver halide must be developed faster. However, the development rate of a silver halide is roughly determined by its halogen composition. Also, this halogen composition is determined in accordance with the sensitivity or the ease of spectral sensitization or in order to use the interimage effect produced in development. Therefore, the development rate of a silver halide cannot be easily changed.
One obstacle to shortening the color development time is that the maximum density of cyan lowers when the color development time is shortened. As a countermeasure against this problem, Jpn. Pat. Appln. KOKAI Publication No. (hereinafter referred to as JP-A-)63-285548 has disclosed a method of reducing the color development time by the use of a photosensitive material in which the silver coating amount is 3.5 to 12 g per m
2
of the material and a silver halide emulsion in each low-speed layer is a monodisperse emulsion.
The present inventors made extensive studies on methods of reducing the color development time including this method disclosed in JP-A-63-235548, and have found that another approach required for recent development processing is to reduce the replenishment of a developer, and that when the replenishment rate of a color developer is reduced the color development time cannot be shortened only by the use of monodisperse emulsions as disclosed in JP-A-63-285548. This is a problem still difficult to solve. Another problem when the color development time is shortened is that uneven color generation produced in the processing step worsens. The method disclosed in JP-A-63-295548 cannot well improve this problem. Hence, the color development time is difficult to reduce also in respect of processing nonuniformity.
BRIEF SUMMARY OF THE INVENTION
It is an object of the present invention to provide a color reversal photosensitive material suitable for reducing the time or replenishment amount of a development step and having small processing nonuniformity, and a color image forming method using the same.
The object of the present invention was achieved by the following photosensitive materials.
(1) A silver halide color reversal photosensitive material comprising 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, and capable of forming a color image when the photosensitive material was subjected to color development in the presence of an aromatic primary amine color developing agent after the photosensitive material was subjected to first development of black-and-white development, wherein the silver halide content in the photosensitive material before the first development is 2.5 to 6.0 g in terms of silver per m
2
of the photosensitive material, the silver halide content in an unexposed portion of the photosensitive material immediately before the color development is 1.0 to 2.5 g in terms of silver per m
2
of the photosensitive material, and the maximum density of each of cyan, magenta, and yellow in the color image after the color development is 3.0 or more.
(2) The color reversal photosensitive material described in item (1) above, wherein at least one of the green- and red-sensitive emulsion layers contains a 2-equivalent coupler, and the molar ratio of this 2-equivalent coupler to all image-forming couplers contained in the photosensitive emulsion layer is 30% to 100%.
(3) The color reversal photosensitive material described in item (1) above, wherein the photosensitive material contains at least one magenta coupler represented by formula (MC-I) below or at least one cyan coupler represented by formula (CC-I) below, and the molar ratio of the coupler to all image-forming couplers in the photosensitive emulsion layer containing the magenta coupler or the cyan coupler is 30% to 100%.
wherein R
1
represents a hydrogen atom or a substituent; one of G
1
and G
2
represents a carbon atom, the other represents a nitrogen atom; and R
2
represents a substituent and bounds to one of G
1
and G
2
which is a carbon atom. R
1
and R
2
can further have a substituent. A polymer of formula (MC-I) can be formed via R
1
or R
2
, or the coupler represented by formula (MC-I) can be bonded to a polymeric chain via R
1
or R
2
. X represents a hydrogen atom or a group which splits off by a coupling reaction with an oxidized form of the aromatic primary amine color developing agent.
In formula (CC-I), G
a
represents —C(R
13
)═ or —N═, provided that when G
a
represents —N═, G
b
represents —C(R
13
)═, and when G
a
represents —C(R
13
)═, G
b
represents —N═. R
13
represents a substituent.
Each of R
11
and R
12
represents an electron attracting group having a Hammett substituent constant &sgr;p value of 0.20 to 1.0. Y represents a hydrogen atom or a group which splits off by a coupling reaction with the oxidized form of the aromatic primary amine color developing agent.
(4) A color image forming method comprising a step of black-and-white development, a step of reversal processing and then a step of color development, wherein the photosensitive material described in one of items (1) to (3) above is subjected to the step of color development with a development time of 1 to 5 min.
(5) A color image forming:method comprising a step of black-and-white development, a step of reversal processing and then a step of color development, wherein the photosensitive material described in one of items (1) to (3) above is subjected to the step of color development in which a replenishment amount of a color developer is set to 1.0 L or less per m
2
of a processing area of the photosensitive material.
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below.
The silver halide color reversal photosensitive material of the present invention has the maximum density of each of yellow, magenta, and cyan of a color image of 3.0 or more. This determination of the density is done by performing Development Process A described in Example 1 of the specification to an unexposed photosensitive material and measuring the color image density (status A) after the processing. The Development Process A in the determination is conducted after running is performed with a photosensitive material to be determined whose 40% in an area ratio was fully exposed to light, until the replenishment amount of the first development becomes three times the tank volume.
A feature of the photosensitive material of the present invention is that the content of a silver halide before the first development is 2.5 to 6.0 g in terms of silve
Matsuda Naoto
Mikoshiba Hisashi
Fuji Photo Film Co. , Ltd.
Letscher Geraldine
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