Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Reexamination Certificate
2000-07-06
2002-01-15
Chea, Thorl (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
C430S264000, C430S573000, C430S577000
Reexamination Certificate
active
06338941
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to silver halide light sensitive black-and-white photographic materials for use in printing plate making (hereinafter, also simply referred to as photographic materials) and an image forming method by the use thereof.
BACKGROUND OF THE INVENTION
Recently, silver halide photographic materials used for printing plate making are often processed using an automatic processor which is connected to a laser outputting apparatus, called an image setter. This photographic material outputted by the image setter is often employed as an exposure original for a pre-sensitized plate (or simply called a PS plate). It is important performance to cause no stain adhesion to the photographic material.
To enhance the production efficiency of the image setter, on the other hand, it is also desired to enhance the transport speed of a photographic material in the processor or shorten the total processing time. However, the inventors of this invention were faced with the problem that increasing the transport speed or shortening the processing time of a processor not only deteriorates dryness of a photographic material but also increases smudges adhering to the photographic material. Specifically, in cases when washing is done with water at a temperature lower than 10° C., stains are often markedly increased to such an extent that it becomes unacceptable in practical use.
To prevent smudge adhesion, a technique of adding an antioxidant to the washing water, as described in JP-A 5-80463 (hereinafter the term, JP-A means an unexamined and unpublished Japanese Patent Application), is known and broadly employed. However, it was proved that this technique was not totally effective and smudging often occurred regardless of whether such a means was used or not.
Recently, concerns for environmental protection have also increased in the market of silver halide photographic materials for use in printing plate making, so that there is noted a technique of forming images with a developer containing ascorbic acid or its derivatives.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a sensitizing dye and a photographic material by use thereof, in which smudging rarely occurs in processing, and an image forming method by the use thereof.
It is another object of the invention to provide an image forming method in which rapid access can be achieved and smudging is prevented, and which is suitable for silver halide photographic materials for use in an image setter.
The above objects can be accomplished by the following constitution:
1. A silver halide light sensitive photographic material comprising a support and at least one hydrophilic colloid layer including a silver halide emulsion layer, wherein the hydrophilic colloid layer comprises a compound represented by the following formula (D):
formula (D)
wherein Y
1
represents —N(R)—, an oxygen atom, a sulfur atom or a selenium atom, in which R represents an aliphatic group having not more than 10 carbon atoms; R
1
represents an aliphatic group, an aryl group or a heterocyclic group, each of which contains at least a water-solubilizing group; V
1
and V
2
each represent a hydrogen atom, an alkyl group, an alkoxy group or an aryl group, or V
1
and V
2
combine with each other to form a ring condensed with an azole ring; n is 1 or 2; m is 0 or 1; L
1
, L
2
, L
3
and L
4
each represent a methine group, provided that at least one of L
1
and L
2
when n is 1 or 2 and m is 0, or at least one of L
1
, L
2
, L
3
and L
4
when n is 1 or 2 and m is 1 contains a substituent group having 3 or more carbon atoms and meeting the following requirement:
SP<544
where SP is a value represented by the following equation:
SP=
3.536 L−2.661 B+535.4
where L represents a STERIMOL parameter (Å) and B represents a smaller value (Å) of the sum of STERIMOL parameters, B
1
+B
4
and B
2
+B
3
; Q
1
and Q
2
each represent a non-metallic atom group necessary to form an acidic cycle; and at least 3 water-solubilizing groups are contained in R
1
and acidic cycles formed by Q
1
and Q
2
;
2. The silver halide photographic material described in 1, wherein the compound represented by formula (D) contains a compound represented by M
1
, in which M
1
is a compound capable of providing ion(s) necessary to compensate for the total charge of the compound of formula (D) when the compound of formula (D) is in an ionic form;
3. The silver halide photographic material described in 1, wherein in formula (D), n is 1 and m is 0;
4. The silver halide photographic material described in 1, wherein the amount of gelatin coated on the silver halide emulsion side of the support is 1.0 to 3.0 g/m
2
;
5. The silver halide photographic material described in 1, wherein the silver halide emulsion layer comprises the compound represented by formula (D);
6. The silver halide photographic material described in 1, wherein the substituent group having 3 or more carbon atoms and meeting the requirement of SP<539 is a substituted or unsubstituted branched alkyl group having 3 or more carbon atoms, a substituted or unsubstituted benzyl group, a substituted or unsubstituted phenethyl group or a substituted or unsubstituted alkoxycarbonyl group having 4 or more carbon atoms;
7. The silver halide photographic material described in 5, wherein the substituent group is an unsubstituted branched alkyl group having 3 or more carbon atoms, an unsubstituted benzyl group, an unsubstituted phenethyl group or an unsubstituted alkoxycarbonyl group having 4 or more carbon atoms;
8. The silver halide photographic material described in 7, wherein the substituent group is isopropyl, branched butyl, branched pentyl, branched hexyl, branched octyl, benzyl, phenethyl, t-butyoxycarbonyl;
9. The silver halide photographic material described in 1, wherein the compound represented by formula (D) is a compound selected from the group consisting of the compounds D-1 through D-27, as described later;
10. The silver halide photographic material described in 1, wherein the hydrophilic colloid layer comprises a hydrazine derivative or a quaternary onium salt;
11. A sensitizing dye represented by the following formula (D):
formula (D)
wherein Y
1
represents —N(R)—, an oxygen atom, a sulfur atom or a selenium atom, in which R represents an aliphatic group having not more than 10 carbon atoms; R
1
represents an aliphatic group, an aryl group or a heterocyclic group, each of which contains at least a water-solubilizing group; V
1
and V
2
each represent a hydrogen atom, an alkyl group, an alkoxy group or an aryl group, or V
1
and V
2
combine with each other to form a ring condensed with an azole ring; n is 1 or 2; m is 0 or 1; L
1
, L
2
, L
3
and L
4
each represent a methine group, provided that at least one of L
1
and L
2
when n is 1 or 2 and m is 0, or at least one of L
1
, L
2
, L
3
and L
4
when n is 1 or 2 and m is 1 contains a substituent group having 3 or more carbon atoms and meeting the following requirement:
SP<539
where SP is a value represented by the following equation:
SP=
3.536 L−2.661 B+535.4
where L represents a STERIMOL parameter (Å) and B represents a smaller value (Å) of the sum of STERIMOL parameters, B
1
+B
4
and B
2
+B
3
; Q
1
, and Q
2
each represent a non-metallic atom group necessary to form an acidic cycle; and at least 3 water-solubilizing groups are contained in R
1
and acidic cycles formed by Q
1
and Q
2
;
12. The sensitizing dye described in 11, wherein the compound represented by formula (D) contains a compound represented by M
1
, in which M
1
is a compound capable of providing ion(s) necessary to compensate for the total charge of the compound of formula (D) when the compound of formula (D) is in an ionic form;
13. The sensitizing dye described in 11, wherein in formula (D), n is 1 and m is 0;
14. The sensitizing dye described in 11, wherein the substituent group having 3 or more carbon atoms and meeting the requirement of SP<5
Arai Takeo
Takabayashi Toshiyuki
Bierman Jordan B.
Bierman, Muserlian and Lucas
Chea Thorl
Konica Corporation
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