Silver halide photographic light-sensitive materials

The fading of latent images in photographic films or the like containing at least a silver halide emulsion layer is greatly diminished by the addition of a compound of the general formulae ##STR1## to the emulsion layer or another hydrophilic colloid layer. The substituents R.sub.1 to R.sub.4 are defined within.

FIELD OF THE INVENTION 
The present invention relates to silver halide photographic light-sensitive 
materials and, particularly, to silver halide photographic light-sensitive 
materials in which the fading of latent images is prevented. 
BACKGROUND OF THE INVENTION 
It is well known that two processes consisting of a photographing exposure 
process for forming latent images and a development process for converting 
the formed latent images into silver images or dye images are necessary in 
obtaining images by a silver halide photographic process (for example, 
refer to Mees and James, The Theory of the Photographic Process). The 
formation of latent images by photographic exposure is chemically caused 
by a very slight change of silver halide crystals, and latent images 
themselves are essentially unstable. Accordingly, the latent images have a 
propensity to easily decay over the passage of time from photographic 
exposure to development processing, which characteristic is known as the 
fading of latent images. The progress of the fading of the latent images 
generally depends upon the preservation condition of the exposed 
photographic materials. For example, it has been observed that the degree 
of fading is remarkably high when such materials are preserved at a high 
temperature, and is low when such are preserved at a low temperature. 
The simplest process for avoiding the disadvantages due to the fading of 
latent images is obviously one which comprises carrying out development 
just after photographic exposure; and the second simplest process is one 
in which the photographic sensitive materials are preserved by cooling at 
a low temperature for the period from exposure to development. These 
processes are easy solutions from the chemical viewpoint, but it is hard 
to say that they are the preferred solutions, considering the users 
convenience. Noting the practical conditions of use and the practical 
state of such use, in the case of negative materials and reversal 
materials for photography, they are often allowed to stand at room 
temperature for several months from exposure to development. In the case 
of positive materials for copying, these are also allowed to sometimes 
stand for several months. 
From the above-described reason, it is desired to obtain silver halide 
photographic light-sensitive materials in which the fading of latent 
images is prevented, and various methods have been attempted hitherto. 
However, as a result of our studies, it has been found that all of these 
known processes, namely, the process using hydroxyl group substituted 
aromatic compounds as described in German Pat. No. 1,107,508, the process 
using 1,3-diones as described in U.S. Pat. No. 3,447,926, the process 
using nitrilotriacetic acid as described in U.S. Pat. No. 3,318,702, the 
process described in U.S. Pat. No. 3,424,583 and the process described in 
German Pat. No. 1,173,339, are insufficient for the abovedescribed 
purpose. 
SUMMARY OF THE INVENTION 
As a result of various studies concerning the above, the present inventors 
have found that tetraazaindene compounds having certain substituents have 
the effect of preventing the fading of latent images. 
Namely, the present invention relates to silver halide photographic 
light-sensitive materials comprising a base and at least a silver halide 
emulsion layer, wherein said emulsion layer or another hydrophilic colloid 
layer contains a compound represented by the following formulae (I) or 
(II): 
##STR2## 
wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrogen 
atom, an alkyl group (preferably, an alkyl group having 1 to 10 carbon 
atoms which is substituted or not substituted, for example, a methyl 
group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl 
group, a t-butyl group, an n-octyl group, a methoxyethyl group, a 
hydroxyethyl group, a hydroxymethyl group or a phenoxymethyl group, etc.), 
an alkenyl group (preferably, an alkenyl group having 2 to 10 carbon atoms 
which is substituted or not substituted, for example, a vinyl group, an 
allyl group or a propargyl group, etc.), an aralkyl group (preferably, an 
aralkyl group having 7 to 12 carbon atoms which is substituted or not 
substituted, for example, a benzyl group or a phenethyl group, etc.), an 
aryl group (preferably, an aryl group having 6 to 12 carbon atoms which is 
substituted or not substituted, for example, a phenyl group, a 
4-methylphenyl group or a 4-methoxyphenyl group, etc.), an alkylthio group 
(preferably, an alkylthio group having 1 to 10 carbon atoms which is 
substituted or not substituted,, for example, a methylthio group or an 
ethylthio group, etc.), an arylthio group (preferably, an arylthio group 
having 6 to 12 carbon atoms which is substituted or not substituted, for 
example, a phenylthio group, etc.), a mercapto group, an alkoxy group 
(preferably, an alkoxy group having 1 to 10 carbon atoms which is 
substituted or not substituted, for example, a methoxy group, an ethoxy 
group, a methoxyethoxy group or a hydroxyethoxy group, etc.), an aryloxy 
group (preferably, an aryloxy group having 6 to 12 carbon atoms which is 
substituted or not substituted, for example, a phenoxy group or a 
4-methylphenoxy group, etc.), a hydroxyl group, an alkylamino group 
(preferably, an alkylamino group having 1 to 10 carbon atoms which is 
substituted or not substituted, for example, a dimethylamino group, a 
methylamino group or a diethylamino group, etc.), an arylamino group 
(preferably, an arylamino group having 6 to 12 carbon atoms which is 
substituted or not substituted, for example, an anilino group, etc.), an 
amino group, a halogen atom (for example, a chlorine atom, a bromine atom 
or a fluorine atom, etc.), a cyano group, an alkoxycarbonyl group 
(preferably, an alkoxycarbonyl group of which alkoxy moiety has 1 to 10 
carbon atoms which is substituted or not substituted, for example, an 
ethoxycarbonyl group, etc.), 
##STR3## 
wherein X represents a bonding group represented by an alkylene group 
(preferably, an alkylene group having 1 to 5 carbon atoms which is 
substituted or not substituted, for example, a methylene group, a 
propylene group or a 2-hydroxypropylene group, etc.), and R.sub.5 and 
R.sub.6, which may be identical or different, each represents a hydrogen 
atom, an alkyl group (preferably, an alkyl group having 1 to 10 carbon 
atoms which is substituted or not substituted, for example, a methyl 
group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl 
group, a t-butyl group, an n-octyl group, a methoxyethyl group or a 
hydroxyethyl group, etc.), an alkenyl group (preferably, an alkenyl group 
having 2 to 10 carbon atoms which is substituted or not substituted, for 
example, an allyl group or a propargyl group, etc.), an aralkyl group 
(preferably, an aralkyl group having 7 to 12 carbon atoms which is 
substituted or not substituted, for example, a benzyl group, a phenethyl 
group or a vinylbenzyl group, etc.), an aryl group (preferably, an aryl 
group having 6 to 12 carbon atoms which is substituted or not 
substituted, for example, a phenyl group or a 4-methylphenyl group, etc.), 
or a heterocyclic group (for example, a 2-pyridyl group, etc.); but at 
least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a hydroxyl group and 
at least one of the others is a group represented by 
##STR4## 
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
In the general formulae (I) or (II) given above, it is more preferred that 
at least one of R.sub.1 to R.sub.4 is a group represented by 
##STR5## 
and, particularly, a group represented by 
##STR6## 
In the formulae, it is more preferred that R.sub.1 be a hydroxyl group. 
Further, it is more preferred that R.sub.3 be a group represented by 
##STR7## 
of R.sub.1 to R.sub.4, it is more preferred that X represent a methylene 
group, and R.sub.5 and R.sub.6, which may be identical or different from 
each other, be each an alkenyl group or an aralkyl group (particularly 
preferably an alkenyl group). 
In the following, examples of tetraazaindenes represented by the general 
formulae (I) and (II) are described, but the compounds used in the present 
invention are not so limited. 
______________________________________ 
Compound 1 
6-(N,N--Diallylcarbamoylmethyl)-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 2 
6-(N--Ethylcarbamoylethyl)-4-hydroxy-2- 
methyl-1,3,3a,7-tetraazaindene 
Compound 3 
6-(N--Phenylcarbamoylmethyl)-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 4 
6-(N--2-Pyridylcarbamoylmethyl)-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 5 
6-(N--Allylcarbamoylmethyl)-2-allyl-4- 
hydroxy-1,3,3a,7-tetraazaindene 
Compound 6 
6-(N--Allylcarbamoylmethyl)-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 7 
4-Hydroxy-2-methylthio-6-(N--vinylbenzyl- 
carbamoylmethyl)-1,3,3a,7-tetraazaindene 
Compound 8 
4-Hydroxy-6-(N--vinylbenzylcarbamoylmethyl)- 
1,3,3a,7-tetraazaindene 
Compound 9 
6-(N,N--Diethylcarbamoylmethyl)-5-ethoxy- 
carbonyl-4-hydroxy-1,3,3a,7-tetraazaindene 
Compound 10 
4-Hydroxy-6-(N--propylcarbamoylpropyl)-2- 
phenoxy-1,3,3a,7-tetraazaindene 
Compound 11 
6-(N--Benzylcarbamoylmethyl)-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 12 
5-Cyano-6-(N,N--diallylcarbamoylmethyl)-4- 
hydroxy-1,3,3a,7-tetraazaindene 
Compound 13 
4-Hydroxy-6-(N--octylcarbamoylmethyl)-2- 
phenyl-1,3,3a,7-tetraazaindene 
Compound 14 
6-(N--Benzylcarbamoylmethyl)-5-bromo-4- 
hydroxy-1,3,3a,7-tetraazaindene 
Compound 15 
2-Benzyl-6-(N,N--diethoxycarbamoylmethyl)-4- 
hydroxy-1,3,3a,7-tetraazaindene 
Compound 16 
6-(N--Allylcarbamoylmethyl)-4-hydroxy-2- 
dimethylamino-1,3,3a,7-tetraazaindene 
Compound 17 
6-(N--Benzylcarbamoylmethyl)-4-hydroxy-2- 
phenylthio-1,3,3a,7-tetraazaindene 
Compound 18 
4-Hydroxy-6-(N--methyl-N--phenylcarbamoyl- 
methyl)-1,3,3a,7-tetraazaindene 
Compound 19 
4-Hydroxy-6-(N--propylcarbamoylmethyl)- 
1,3,3a,7-tetraazaindene 
Compound 20 
6-(N,N--Dipropylcarbamoylmethyl)-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 21 
6-(N--Benzyl-N--methylcarbamoylmethyl)-4- 
hydroxy-1,3,3a,7-tetraazaindene 
Compound 22 
6-[N--(2-methoxyphenyl)carbamoylmethyl] 9 -4- 
hydroxy-1,3,3a,7-tetraazaindene 
Compound 23 
6-[N--(2-methylphenyl)carbamoylmethyl]-4- 
hydroxy-1,3,3a,7-tetraazaindene 
Compound 24 
6-[N--(2,5-dimethoxyphenyl)carbamoylmethyl]- 
4-hydroxy-1,3,3a,7-tetraazaindene 
Compound 25 
6-Acetylaminomethyl-4-hydroxy-1,3,3a,7- 
tetraazaindene 
Compound 26 
6-(3-Butenoylaminomethyl)-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 27 
4-Hydroxy-6-(.alpha.-phenylacetylaminomethyl)- 
1,3,3a,7-tetraazaindene 
Compound 28 
6-(N,N--Diallylsulfamoylmethyl)-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 29 
6-(N--Benzylsulfamoylmethyl)-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 30 
4-Hydroxy-6-(methanesulfonamidomethyl)- 
1,3,3a,7-tetraazaindene 
Compound 31 
6-Benzenesulfonamidomethyl-4-hydroxy- 
1,3,3a,7-tetraazaindene 
Compound 32 
6-(N,N--Diallylcarbamoylmethyl)-4-hydroxy- 
1,2,3a,7-tetraazaindene 
Compound 33 
6-(N--Vinylbenzylcarbamoylmethyl)-4-hydroxy- 
1,2,3a,7-tetraazaindene 
Compound 34 
6-Acetylaminomethyl-4-hydroxy-1,2,3a,7- 
tetraazaindene 
Compound 35 
6-(3-Butenoylaminomethyl)-4-hydroxy- 
1,2,3a,7-tetraazaindene 
Compound 36 
6-Benzenesulfonamidomethyl-4-hydroxy- 
1,2,3a,7-tetraazaindene 
Compound 37 
6-(N--Allylsulfamoyl)-4-hydroxy-1,2,3a,7- 
tetraazaindene 
______________________________________ 
Particularly preferred compounds are Compounds 7, 8 and 12. 
General processes for synthesizing tetraazaindenes represented by the 
general formula (I) and (II) have been described in Ber., 42, 4638 (1909) 
and Photo-Rundsch, 26, 414, 437 and 465 (1961), etc. In the following, 
examples of the synthesis of typical compounds are described, but other 
tetraazaindenes can be easily synthesized according to such examples.

SYNTHESIS EXAMPLE 1 
Synthesis of 
6-(N,N-Diallylcarbamoylmethyl)-4-hydroxy-1,3,3a,7-tetraazaindene (Compound 
1) 
126 g of aminotriazole, 304 g of diethyl acetonedicarboxylate and 60 ml of 
acetic acid were refluxed with heating for 8 hours. After cooling in the 
air, 500 ml of ethyl acetate was added to precipitate white crystals. The 
resulting crystals were filtered out and washed with ethyl acetate to 
obtain 305 g of 6-ethoxycarbonylmethyl-4-hydroxy-1,3,3a,7-tetraazaindene. 
Then, 300 g of the resulting crystals, 130 g of sodium hydroxide and 500 
ml of water were heated to 80.degree. C. for 3 hours. After the reaction, 
340 ml of concentrated hydrochloric acid was slowly added to precipitate 
white crystals. The resulting crystals were filtered out and 
recrystallized from water to obtain 212 g of 
6-carboxymethyl-4-hydroxy-1,3,3a,7-tetraazaindene. 
143 g of the resulting crystals and 72 g of diallylamine were dissolved in 
1.5 l of dimethylformamide with stirring at room temperature. To this 
solution, 152 g of N,N-dicyclohexylcarbodiimide was added dropwise. After 
this addition, the mixture was stirred at room temperature for 8 hours to 
separate white crystals (N,N-dicyclohexylurea). After the separated 
crystals were filtered off, the filtrate was poured into 3 l of water to 
separate white crystals. The separated crystals were filtered out and 
recrystallized from acetonitrile to obtain 171 g of the desired 
6-(N,N-diallylcarbamoylmethyl)-4-hydroxy-1,3,3a,7-tetraazaindene. 
The product was identified by the results of IR, NMR and elementary 
analysis. 
Elementary Analysis (C.sub.13 H.sub.15 N.sub.5 O.sub.2) Theoretical Value 
(%): H: 5.53 C: 57.13 N: 25.62. Measured Value (%): H: 5.48 C: 57.23 N: 
25.58. 
SYNTHESIS EXAMPLE 2 
Synthesis of 
4-hydroxy-6-(N-vinylbenzylcarbamoylmethyl)-1,3,3a,7-tetraazaindene 
(Compound 8) 
143 g of 6-carboxymethyl-4-hydroxy-1,3,3a,7-tetraazaindene prepared in 
Synthesis Example 1 and 98 g of vinylbenzylamine were dissolved in 1 l of 
dimethylformamide with stirring at room temperature. To the solution, 152 
g of N,N-dicyclohexylcarbodiimide was added dropwise. After addition, the 
mixture was stirred at room temperature for 6 hours to separate white 
crystals (N,N-dicyclohexylurea). After the reaction, the separated 
crystals were filtered off and the filtrate was poured into 2 l of water 
to separate white crystals. The separated crystals were filtered out and 
recrystallized from acetonitrile to obtain 180 g of the desired 
4-hydroxy-6-(N-vinylbenzylcarbamoylmethyl)-1,3,3a,7-tetraazaindene. 
The product was identified by the results of IR, NMR and elementary 
analysis. 
Elementary Analysis (C.sub.16 H.sub.15 N.sub.5 O.sub.2) Theoretical Value 
(%): H: 4.89 C: 62.13 N: 22.64. Measured Value (%): H: 4.84 C: 62.10 N: 
22.59. 
The tetraazaindene compounds of the present invention can be contained in a 
suitable silver halide emulsion layer or another hydrophilic colloid layer 
of the photographic light-sensitive material. That is, they may be added 
to photographic silver halide emulsion layers or may be incorporated into 
other light-insensitive layers, for example, a protective layer, an 
intermediate layer, a filter layer or an antihalation layer, etc. 
Preferably, they are added to silver halide photographic emulsion layers. 
It is preferred that the tetraazaindene compounds be used in an amount of 
1.times.10.sup.-5 to 1 mol per mol of silver halide and, preferably, 
2.times.10.sup.-4 to 5.times.10.sup.-2 mol. 
It is not necessary to particularly restrict the time of adding the 
compounds of the present invention, but it is preferred to add the same 
after chemical ageing or just before coating, because both the effect of 
preventing the fading of latent images and the effect of stabilizing the 
silver halide photographic light-sensitive emulsions are remarkably 
exhibited. 
In order to add the compounds of the present invention to the photographic 
light-sensitive materials, it is possible to use conventional methods for 
adding additives to photographic emulsions. For example, water-soluble 
compounds are added to the emulsions as an aqueous solution having a 
suitable concentration and water-insoluble or poorly soluble compounds are 
added as a solution resulting from dissolving the same in a suitable 
organic solvent which does not have an adverse influence upon photographic 
properties, selected from, for example, alcohols, ethers, glycols, 
ketones, esters and amides, etc. It is also possible to use well known 
methods for adding water-insoluble couplers (the so-called oil-soluble 
couplers) as a state of dispersion to the emulsion. 
The silver halide particles used in the present invention may be either the 
substantially surface latent image type or the substantially internal 
latent image type. Substantially surface latent image type silver halide 
particles are effectively used. 
The term "substantially surface latent image type" as used in the present 
invention is defined as where the sensitivity obtained by surface 
development (A) is higher than that obtained by internal development (B) 
when a light-sensitive material prepared by applying an emulsion, to which 
the compound represented by the general formulae (I) or (II) of the 
present invention is not added, to a conventionally used transparent base 
is exposed to light for 1 to 1/100 second and thereafter developed by the 
following surface development (A) and internal development (B). Here, the 
sensitivity is defined as the following. 
EQU S=(100/Eh) 
where S represents a sensitivity and Eh represents an exposure necessary to 
obtain the middle density between the maximum density (D.sub.max) and the 
minimum density (D.sub.min): 1/2(D.sub.max +D.sub.min). 
Surface Development (A) 
Development is carried out in a developing solution having the following 
composition at a temperature of 20.degree. C. for 10 minutes. 
______________________________________ 
N--Methyl-p-aminophenol (hemisulfate) 
2.5 g 
Ascorbic acid 10.0 g 
Sodium metaborate tetrahydrate 
35.0 g 
Potassium bromide 1.0 g 
Water to make 1 l 
______________________________________ 
Internal Development (B) 
The light-sensitive material is treated in a bleaching solution containing 
3 g/l of red prussiate and 0.0125 g/l of phenosafranine at about 
20.degree. C. for 10 minutes, followed by washing with water for 10 
minutes and developing in a developing solution having the following 
composition at 20.degree. C. for 10 minutes. 
______________________________________ 
N--Methyl-p-aminophenol (hemisulfate) 
2.5 g 
Ascorbic acid 10.0 g 
Sodium metaborate tetrahydrate 
35.0 g 
Potassium bromide 1.0 g 
Sodium thiosulfate 3.0 g 
Water to make 1 l 
______________________________________ 
The silver halide in the silver halide light-sensitive materials used in 
the present invention is composed of silver chloride, silver 
chlorobromide, silver bromide, silver iodobromide or silver 
iodobromochloride. The average particle size of silver halide particles is 
not particularly restricted, but it is preferred that they not be larger 
than 3.mu.. 
Although the so-called primitive emulsions which are not subjected to 
chemical sensitization can be used, silver halide emulsions generally are 
subjected to chemical sensitization. In order to carry out chemical 
sensitization, it is possible to use methods described in P. Glafkides, 
Chimie et Physique Photographique (Paul Montel, 1967), V. L. Zelikman et 
al., Making and Coating Photographic Emulsion (The Focal Press, 1964), and 
Die Grundlagen der Photographischen Prozesse mit Silberhalogeniden, edited 
by H. Frieser (Akademische Verlagsgesellschaft, 1968). 
Namely, it is possible to use a sulfur sensitization process using 
thiosulfates, thioureas, thiazoles, rhodanines or activated gelatin; a 
reduction sensitization process using stannous salts, amines, hydrazines, 
formamidinesulfinic acid or silane compounds, etc.; and a noble metal 
sensitization process using gold complex salts or complex salts of other 
metals belonging to Group VII in the Periodic Table such as platinum, 
iridium or palladium, etc.; which may be used alone or in combination. 
In order to increase the sensitivity, improve contrast or accelerate 
development, it is possible to add polyalkylene oxides and derivatives 
thereof such as ethers, esters or amines; etc., thioether compounds, 
thiomorpholines, quaternary ammonium salt compounds, urethane derivatives, 
urea derivatives, imidazole derivatives and 3-pyrazolidones, etc. For 
example, it is possible to use those described in U.S. Pat. Nos. 
2,400,532, 2,423,549, 2,716,062, 3,617,280, 3,772,021 and 3,808,003, and 
others. 
In order to prevent fogging or stabilize photographic properties in the 
step of producing the light-sensitive materials, during preservation or 
during photographic processing, it is possible to add various compounds. 
Namely, it is possible to add many compounds known as antifoggants or 
stabilizers, such as azoles, for example, benzothiazolium salts, 
nitroimidazoles, nitrobenzimidazoles, chlorobenzimidazoles, 
bromobenzimidazoles, mercaptothiazoles, mercaptobenzothiazoles, 
mercaptobenzimidazoles, mercaptothiadiazoles, aminotriazoles, 
benzotriazoles, nitrobenzotriazoles and mercaptotetrazoles (particularly, 
1-phenyl-5-mercaptotetrazole), etc.; mercaptopyrimidines; 
mercaptotriazines; thioketo compounds, for example, oxazolinethione; 
triazaindenes, 4-hydroxy-6-methyl-(1,3,3a,7)-tetraazaindene and 
pentaazaindenes, etc.; and benzenesulfinic acid and benzenesulfonic acid 
amides, etc. 
In the present invention, gelatin is advantageously used as a binder or as 
a protective colloid for the photographic emulsions, but other hydrophilic 
colloids can be used as well. 
For example, it is possible to use proteins such as gelatin derivatives, 
graft polymers of gelatin and other high polymers, albumin or casein, 
etc.; saccharide derivatives such as cellulose derivatives such as 
hydroxyethyl cellulose, carboxymethyl cellulose or cellulose sulfuric acid 
ester, etc., sodium alginate or starch derivatives, etc.; and various 
synthetic hydrophilic high molecular substances such as homo- or 
copolymers such as polyvinyl alcohol, polyvinyl alcohol partial acetal, 
poly-N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, 
polyacrylamide, polyvinylimidazole or polyvinylpyrazole, etc. 
As gelatin, not only lime treated gelatin but acid treated gelatin may be 
used, and gelatin hydrolyzed products and gelatin enzymic decomposition 
products can be used as well. 
The photographic emulsion layers or other hydrophilic colloid layers in the 
light-sensitive materials of the present invention may contain various 
known surface active agents for use as coating assistants or for various 
purposes such as for preventing static charges, improvement of lubricating 
properties, emulsification and dispersion, prevention of adhesion or 
improvement of photographic properties (for example, acceleration of 
development, hard tone, and sensitization), etc. 
For example, it is possible to use nonionic surface active agents such as 
saponin, alkylene oxide derivatives (for example, polyethylene glycols, 
polyalkylene glycol alkylamine or amides and polyethylene oxide addition 
products of silicone, etc.), glycidol derivatives (for example, 
alkenylsuccinic acid polyglyceride, etc.), aliphatic acid esters of 
polyhydric alcohols, alkyl esters of saccharose, and urethanes or ethers 
of saccharose, etc.; anionic surface active agents such as triterpenoid 
saponin, alkyl carboxylic acid salts, alkylbenzenesulfonic acid salts, 
alkyl sulfuric acid esters, alkyl phosphoric acid esters, 
N-acyl-N-alkyltaurines, sulfosuccinic acid esters or sulfoalkyl 
polyoxyethylene alkylphenyl ethers, etc.; ampholytic surface active agents 
such as amino acids, aminoalkylsulfonic acids, aminoalkylsulfuric or 
phosphoric acid esters, alkylbetaines, amine imides or amine oxides, etc.; 
and cationic surface active agents such as alkylamine salts, aliphatic or 
aromatic quaternary ammonium salts, heterocyclic quaternary ammonium salts 
such as pyridinium or imidazolium salts, or aliphatic or heterocyclic 
phosphonium or sulfonium salts, etc. 
In the photographic light-sensitive materials of the present invention, the 
photographic emulsion layers and other hydrophilic colloid layers may 
contain a dispersion of water-insoluble or poorly soluble synthetic 
polymers for the purpose of improving dimensional stability. For example, 
it is possible to use polymers composed of one or more of alkyl acrylates 
or methacrylates, alkoxyalkyl acrylates or methacrylates, glycidyl 
acrylates or methacrylates, acryl or methacrylamide, vinyl esters (for 
example, vinyl acetate), acrylonitrile, olefins and styrene, etc., and 
polymers composed of the above-described monomer and acrylic acid, 
methacrylic acid, .alpha.,.beta.-unsaturated dicarboxylic acid, 
hydroxyalkyl acrylate or methacrylate, sulfoalkyl acrylate or methacrylate 
or styrene sulfonic acid, etc., as a monomer component. 
In the photographic light-sensitive materials of the present invention, the 
photographic emulsion layers and other hydrophilic colloid layers may 
contain inorganic or organic hardening agents. For example, it is possible 
to use chromium salts (chromium alum or chromium acetate, etc.), aldehydes 
(formaldehyde, glyoxal or glutaraldehyde, etc.), N-methylol compounds 
(dimethylolurea or methyloldimethylhydantoin, etc.), dioxane derivatives 
(2,3-dihydroxydioxane, etc.), active vinyl compounds 
(1,3,5-triacryloyl-hexahydro-s-triazine or bis(vinylsulfonyl)methyl ether, 
etc.), active halogen compounds (2,4-dichloro-6-hydroxy-s-triazine, etc.), 
mucohalogenic acids (mucochloric acid or mucophenoxychloric acid, etc.), 
isoxazoles, dialdehyde starch, and 2-chloro-6-hydroxytriazinyl gelatin, 
etc., which may be used alone or in combination. 
The photographic emulsions of the present invention may be spectrally 
sensitized with methine dyes or others. Examples of dyes used include 
cyanine dyes, merocyanine dyes, compound cyanine dyes, compound 
merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes 
and hemioxonol dyes. Particularly useful dyes are those belonging to 
merocyanine dyes and compound merocyanine dyes. In these dyes, any nucleus 
conventionally used for cyanine dyes can be utilized as a basic 
heterocyclic nucleus. Namely, it is possible to utilize a pyrroline 
nucleus, an oxazoline nucleus, a thiazoline nucleus, a pyrrole nucleus, an 
oxazole nucleus, a thiazole nucleus, a selenazole nucleus, an imidazole 
nucleus, a tetrazole nucleus and a pyridine nucleus, etc.; the 
above-described nuclei with which an alicyclic hydrocarbon ring fuses; the 
above-described nuclei with which an aromatic hydrocarbon ring fuses, 
namely, an indolenine nucleus, a benzindolenine nucleus, an indole 
nucleus, a benzoxazole nucleus, a naphthoxazole nucleus, a benzothiazole 
nucleus, a naphthothiazole nucleus, a benzoselenazole nucleus, a 
benzimidazole nucleus and a quinoline nucleus, etc. These nuclei may have 
substituents on carbon atoms. 
In the merocyanine dyes and compound merocyanine dyes, it is possible to 
utilize, as nuclei having a ketomethylene structure, 5 to 6 member 
heterocyclic nuclei such as a pyrazolin-5-one nucleus, a thiohydantoin 
nucleus, a 2-thioxazolidin-2,4-dione nucleus, a thiazolidin-2,4-dione 
nucleus, a rhodanine nucleus or a thiobarbituric acid nucleus, etc. 
In the photographic light-sensitive materials of the present invention, the 
hydrophilic colloid layers may contain water-soluble dyes (oxonol dyes, 
hemioxonol dyes, styryl dyes, merocyanine dyes, cyanine dyes and azo dyes, 
etc.) as filter dyes or for other purposes such as preventing irradiation. 
The photographic emulsions of the present invention may contain dye image 
forming couplers, namely, compounds which form a dye by reacting with an 
oxidation product of aromatic amine (generally, primary amine) developing 
agents (hereinafter referred to as couplers). The couplers are desired to 
have a hydrophobic group called a ballast group in the molecule by which 
they become non-diffusible. The couplers may be any of 4-equivalent ones 
and 2-equivalent ones to silver ions. Further, colored couplers having an 
effect of color correction or couplers which release a development 
inhibitor (the so-called DIR coupler) may be contained therein. The 
couplers may be ones which form a colorless product by a coupling 
reaction. 
As yellow couplers, known opened chain ketomethylene couplers can be used. 
Among them, benzoylacetanilide compounds and pivaloylacetanilide compounds 
are advantageously used. 
As magenta couplers, pyrazolone compounds, imidazolone compounds, and 
cyanoacetyl compounds can be used, and particularly, pyrazolone compounds 
are advantageously used. 
As cyan couplers, phenol compounds and naphthol compounds, etc., can be 
used. 
As DIR couplers, it is possible to use those described in, for example, 
U.S. Pat. Nos. 3,227,554, 3,617,291, 3,701,783, 3,790,384 and 3,632,345, 
German Patent Application (OLS) Nos. 2,414,006, 2,454,301 and 2,454,329, 
British Pat. No. 953,454 and Japanese Patent Application (OPI) No. 
69624/77 (the term "OPI" as used herein refers to a "published unexamined 
Japanese patent application"). 
In addition to DIR couplers, compounds which release a development 
inhibitor by development may be contained in the light-sensitive 
materials. For example, it is possible to use those described in U.S. Pat. 
Nos. 3,297,445 and 3,379,529 and German Patent Application (OLS) No. 
2,417,914. 
Two or more of the above-described couplers may be contained in the same 
layer. The same compound may be contained in two or more different layers. 
Light-sensitive materials produced by the present invention may contain 
hydroquinone derivatives, aminophenol derivatives, gallic acid derivatives 
and ascorbic acid derivatives, etc., as anti-color-fogging agents. 
In the light-sensitive materials produced by the present invention, the 
hydrophilic colloid layers may contain ultraviolet ray absorbing agents 
such as benzotriazole compounds substituted by an aryl group. 
The photographic emulsions of the present invention are applied to a 
flexible base such as a conventionally used plastic film (cellulose 
nitrate, cellulose acetate or polyethylene terephthalate, etc.) or paper, 
etc., or a rigid base such as glass, etc. 
The present invention can be applied to multilayer multicolor photographic 
materials having at least two layers each having a different sensitivity. 
Multilayer natural color photographic materials each generally has at 
least a red-sensitive emulsion layer, a green-sensitive emulsion layer and 
a blue-sensitive emulsion layer on a base. The order of these layers is 
suitably determined as occasion demands. Generally, the red-sensitive 
emulsion layer contains a cyan coupler, the green-sensitive emulsion layer 
contains a magenta coupler, and the blue-sensitive emulsion layer contains 
a yellow coupler, but, if desired, other combinations may be utilized. 
Exposure for obtaining photographic images in the present invention is 
suitably carried out by a conventional method. Namely, it is possible to 
use any of various known light sources, for example, natural light 
(sunlight), tungsten lamps, fluorescent lamps, mercury lamps, xenon arc 
lamps, carbon arc lamps, xenon flash lamps and cathode ray tube flying 
spots. As the exposure time, it is possible to use not only exposures in a 
range from 1/1,000 second to 1 second as is used in conventional cameras, 
but also exposures shorter than 1/1,000 second, for example, 
1.times.10.sup.-4 to 1.times.10.sup.-6 second using a xenon flash lamp or 
a cathode ray tube, and exposures longer than 1 second. 
In order to carry out photographic processing of the light-sensitive 
materials of the present invention, any known process can be used. As 
processing solutions, known ones can be used. The processing temperature 
is selected generally in the range of 18.degree. C. to 50.degree. C., but 
a temperature lower than 18.degree. C. or a temperature higher than 
50.degree. C. may be used. Any development processing for forming silver 
images (black-and-white photographic processing) and color photographic 
processing comprising development processing for forming dye images can be 
adopted according to the purpose. 
The developing solution used when carrying out black-and-white photographic 
processing may contain known developing agents. As developing agents, it 
is possible to use dihydroxybenzenes (for example, hydroquinone), 
3-pyrazolidones (for example, 1-phenyl-3-pyrazolidone), aminophenols (for 
example, N-methyl-p-aminophenol), 1-phenyl-3-pyrazolines, ascorbic acid, 
and heterocyclic compounds such as a compound in which a 
1,2,3,4-tetrahydroquinoline ring is fused with an indolene ring as 
described in U.S. Pat. No. 4,067,872, which agents may be used alone or in 
combination. The developing solution generally may further contain known 
preservatives, alkali agents, pH buffer agents and antifoggants, etc., 
and, if desired, dissolution assistants, color toning agents, development 
accelerators, surface active agents, defoaming agents, water softeners, 
hardeners and viscosity increasing agents, etc. 
As the fixing solution, it is possible to use conventionally used 
compositions. As the fixing agent, it is possible to use not only 
thiosulfates and thiocyanates but also known organic sulfur compounds 
having a fixing effect. The fixing solution may contain watersoluble 
aluminum salts as a hardening agent. 
In the case of forming dye images, conventional processes can be applied. A 
negative-positive process (described in, for example, Journal of the 
Society of Motion Picture and Television Engineers, Vol. 61, pages 667-701 
(1953)), a color reversal process which comprises developing with a 
developing solution containing a black-and-white developing agent to form 
negative silver images, carrying out at least one uniform exposure or 
suitable fogging treatment, and subsequently carrying out color 
development to obtain dye positive images, and a silver dye bleaching 
process which comprises developing photographic emulsion layers containing 
dyes after exposure to form silver images, and bleaching dyes by utilizing 
the silver images as a bleaching catalyst, etc., may be used. 
The color developing solution generally consists of an aqueous alkaline 
solution containing a color developing agent. As color developing agents, 
it is possible to use known primary aromatic amine developing agents, for 
example, phenylenediamines (for example, 4-amino-N,N-diethylaniline, 
3-methyl-4-amino-N,N-diethylaniline, 
4-amino-N-ethyl-N-.beta.-hydroxyethylaniline, 
3-methyl-4-amino-N-ethyl-N-.beta.-hydroxyethylaniline, 
3-methyl-4-amino-N-ethyl-N-.beta.-methanesulfonamidoethylaniline and 
4-amino-3-methyl-N-ethyl-N-.beta.-methoxyethylaniline, etc.). 
In addition, those agents described in L. F. A. Mason, Photographic 
Processing Chemistry, pages 226-229 (issued by Focal Press, 1966), U.S. 
Pat. Nos. 2,193,015 and 2,592,364 and Japanese Patent Application (OPI) 
No. 64933/73, etc., may be used. 
The color developing solution can further contain pH buffer agents such as 
sulfites, carbonates, borates and phosphates of alkali metals, and 
development inhibitors or antifogging agents such as bromides, iodides or 
organic antifoggants. If desired, it may contain water hardeners, 
preservatives such as hydroxylamine, organic solvents such as benzyl 
alcohol or diethylene glycol, development accelerators such as 
polyethylene glycol, quaternary ammonium salts or amines, color forming 
couplers, competitive couplers, fogging agents such as sodium borohydride, 
auxiliary developing agents such as 1-phenyl-3-pyrazolidone, viscosity 
increasing agents, polycarboxylic acid chelating agents as described in 
U.S. Pat. No. 4,083,723, and antioxidants as described in German Patent 
Application (OLS) No. 2,622,950, etc. 
The photographic emulsion layers after color development are generally 
subjected to bleaching. The bleaching process may be carried out 
simultaneously with fixation or may be carried out separately. As 
bleaching agents, compounds of polyvalent metal such as iron (III), cobalt 
(III), chromium (VI) or copper (II), etc., peracids, quinones and nitroso 
compounds, etc., may be used. For example, it is possible to use 
ferricyanides; bichromates; organic complex salts of iron (III) or cobalt 
(III) with aminopolycarboxylic acids such as ethylenediaminetetraacetic 
acid, nitrilotriacetic acid or 1,3-diamino-2-propanoltetraacetic acid, 
etc., or organic acids such as citric acid, tartaric acid or malic acid, 
etc.; persulfates, permanganates; and nitrosophenol, etc. Among them, 
potassium ferricyanide, sodium ethylenediaminetetraacetato iron (III) 
complex and ammonium ethylenediaminetetraacetato iron (III) complex are 
particularly useful. Ethylenediaminetetraacetato iron (III) complexes are 
useful in both an independent bleaching solution and in a one-bath 
bleach-fixing solution. 
To the bleaching solution or the bleach-fixing solution, it is possible to 
add various additives including bleach accelerators as described in U.S. 
Pat. Nos. 3,042,520 and 3,241,966 and Japanese Patent Publications Nos. 
8506/70 and 8836/70, etc., and thiol compounds as described in Japanese 
Patent Application (OPI) No. 65732/78. 
The photographic light-sensitive materials of the present invention are 
particularly suitable for use as photographing light-sensitive materials 
(for example, black-and-white negative films, color negative films and 
reversal films, etc.), because the fading of the latent images is not only 
remarkably prevented but also stabilized by using tetraazaindenes; but 
these materials may also be used for other uses (for example, 
black-and-white printing paper or color printing paper, etc.). 
In the following, the present invention will be illustrated in greater 
detail with reference to examples thereof. 
EXAMPLE 1 
To a silver iodobromide gelatin emulsion containing 6% by mol of silver 
iodide (particle size: about 0.75.mu.), 5 mg of sodium thiosulfate, 3.5 mg 
of potassium chloroaurate and 0.18 g of ammonium thiocyanate, based on 1 
mol of silver halide, were added, and the emulsion was aged at 60.degree. 
C. for 50 minutes. 
This emulsion was divided into 15 parts, to which a compound of the present 
invention or a comparative compound as shown in the following Table 1, a 
hardening agent (sodium 2,4-dichloro-6-hydroxy-1,3,5-triazine) and a 
coating assistant (sodium dodecylbenzenesulfonate) were added. The 
emulsions were applied to a triacetate film, followed by drying to obtain 
samples. 
These samples were exposed to light for 1/100 second through an optical 
wedge. After they were developed with a Kodak D-72 developing solution at 
20.degree. C. for 4 minutes, they were subjected to fixation, water wash 
and drying by conventional methods. 
______________________________________ 
D-72 Developing Solution: 
______________________________________ 
Metol 3.1 g 
Na.sub.2 SO.sub.3 45.0 g 
Hydroquinone 12.0 g 
Na.sub.2 CO.sub.3 79.0 g 
KBr 1.9 g 
Water to make 1 l 
______________________________________ 
Relative sensitivities in the case of development just after exposure, in 
the case of development after being allowed to stand for 21 days at room 
temperature (20.degree. to 25.degree. C.) after exposure, and in the case 
of carrying out exposure and development after being preserved at a 
temperature of 50.degree. C. under an atmosphere having a relative 
humidity of 20% for 7 days, are respectively shown in Table 1. By 
comparing these values, it is possible to ascertain the degree of fading 
of the latent images. 
In Table 1, the relative sensitivity is a relative value of the reciprocal 
of an exposure at which the density 0.2 excluding fog density is obtained, 
based on the value of Sample No. 1 in the case of development just after 
exposure being equal to 100. 
TABLE 1 
__________________________________________________________________________ 
Relative Sensitivity 
Relative Sensitivity and Fog 
in the Case of 
in the Case of Carrying out 
Relative Sensitivity 
Development after 
Exposure and Development 
in the Case of 
Standing at Room 
after Standing at 
Sample Amount Development just 
Temperature for 21 
50.degree. C. and 20% RH for 7 
Days 
No. Compound 
mol/mol-Ag 
after Exposure 
Days after Exposure 
Relative Sensitivity 
Fog 
__________________________________________________________________________ 
1 No addition 
-- 100 83 115 0.13 
2 Compound 8 
1.0 .times. 10.sup.-3 
100 91 115 0.06 
3 " 4.5 .times. 10.sup.-3 
95 100 100 0.05 
4 " 3.6 .times. 10.sup.-3 
100 93 115 0.06 
5 " 1.1 .times. 10.sup.-2 
93 96 115 0.05 
6 Compound 22 
9.0 .times. 10.sup.-3 
96 96 115 0.05 
7 Compound 23 
4.2 .times. 10.sup.-3 
100 96 110 0.06 
8 " 1.7 .times. 10.sup.-2 
100 96 103 0.05 
9 " 5.1 .times. 10.sup.-2 
100 100 98 0.04 
10 Compound 24 
4.2 .times. 10.sup.-3 
93 93 96 0.06 
11 " 1.7 .times. 10.sup.-2 
91 96 89 0.05 
12 " 5.1 .times. 10.sup.-2 
85 102 85 0.04 
13 Compound 4 
5.1 .times. 10.sup.-2 
100 102 115 0.04 
14 Comparative* 
4.5 .times. 10.sup.-4 
100 83 115 0.07 
Compound A 
15 comparative* 
5.4 .times. 10.sup.-3 
100 83 100 0.06 
Compound A 
__________________________________________________________________________ 
*Comparative Compound A: 
##STR8## 
It will be understood from Table 1 that the fading of latent images is 
restrained by the addition of the compounds of the present invention 
(Sample Nos. 2 to 13). Further, it will be understood that an increase of 
fogging is restrained in the case where the samples are allowed to stand 
at a high temperature and low humidity. 
EXAMPLE 2 
To a paper base, both faces of which were laminated with polyethylene, the 
following first layer (lowest layer) to sixth layer (top layer) were 
applied to produce a multilayered color light-sensitive material (Sample 
1). (In the table, mg/m.sup.2 indicates the amount of application.) 
______________________________________ 
Sixth Layer 
Gelatin 1,500 mg/m.sup.2 
(protective 
layer) 
Fifth Layer 
Silver chlorobromide 
(red-sensitive 
emulsion (silver bromide: 
layer) 50% by mol, silver: 
250 mg/m.sup.2) 
Gelatin 1,500 mg/m.sup.2 
Cyan coupler (*1) 500 mg/m.sup.2 
Solvent for coupler (*2) 
250 mg/m.sup.2 
Fourth Layer 
Gelatin 1,200 mg/m.sup.2 
(ultraviolet ray 
Ultraviolet ray absorbing 
700 mg/m.sup.2 
absorbing layer) 
agent (*3) 
Solvent for ultraviolet 
250 mg/m.sup.2 
ray absorbing agent (*2) 
Third Layer 
Silver chlorobromide 
(green-sensitive 
emulsion (silver bromide: 
layer) 70% by mol, silver: 
350 mg/m.sup.2) 
Gelatin 1,500 mg/m.sup.2 
Magenta coupler (*4) 
400 mg/m.sup.2 
Solvent for coupler (*5) 
400 mg/m.sup.2 
Second Layer 
Gelatin 1,000 mg/m.sup.2 
(intermediate 
layer) 
First Layer 
Silver chlorobromide 
(blue-sensitive 
(silver bromide: 80% by 
layer) mol, silver: 350 mg/m.sup.2) 
Gelatin 1,500 mg/m.sup.2 
Yellow coupler (*6) 
500 mg/m.sup.2 
Solvent for coupler (*2) 
500 mg/m.sup.2 
Base Polyethylene laminated 
paper (polyethylene of 
the first layer side 
contains white pigment 
(TiO.sub.2, etc.) and blue 
pigment (ultramarine, 
etc.)) 
______________________________________ 
(*1) Cyan coupler: 2[.alpha.-(2,4-Di-t-amylphenoxy)-butanamide] 
-4,6-dichloro-5-methylphenol 
(*2) Solvent: Trinonyl phosphate 
(*3) Ultraviolet ray absorbing agent: 
2(2-Hydroxy-3-sec-butyl-t-butylphenyl)benzo-triazole 
(*4) Magenta coupler: 
1(2,4,6-Trichlorophenyl)-3-(2-chloro-5-tetradecanamide)-anilino-2-pyrazol 
n-5-one 
(*5) Solvent for coupler: oCresyl phosphate 
(*6) Yellow coupler: 
.alpha.-Pivaloyl.alpha.-(2,4-dioxo-5,5-dimethyloxazolidin-3-yl)-2-chloro- 
-[.alpha.-(2,4-di-t-amyl-phenoxy)butanamide]acetanilide 
To the third layer in Sample 1, Compound No. 8 of the present invention was 
added in an amount of 1.times.10.sup.-2 mol/mol of Ag to produce Sample 2, 
and Compounds No. 6 and No. 1 were added in an amount of 1.times.10.sup.-2 
mol/mol of Ag to produce Samples 3 and 4, respectively. For comparison, 
Sample 5 was produced using Compound A. 
The above-described light-sensitive materials were processed in the 
following steps immediately after exposure to green light through an 
optical wedge, or after being preserved in a dark box at room temperature 
for 2 days after exposure to green light through an optical wedge. 
______________________________________ 
Processing Step (33.degree. C.) 
______________________________________ 
Color development 3 minutes and 30 seconds 
Bleach-fixation 1 minute and 30 seconds 
Water wash 3 minutes 
Drying (50 to 80.degree. C.) 
2 minutes 
______________________________________ 
Compositions of each processing solution are as follows: 
______________________________________ 
Color Developing Solution: 
______________________________________ 
Benzyl alcohol 12 ml 
Diethylene glycol 5 ml 
Potassium carbonate 25 g 
Sodium chloride 0.1 g 
Sodium bromide 0.5 g 
Anhydrous sodium sulfite 2 g 
Hydroxylamine sulfate 2 g 
Fluorescent whitening agent 
1 g 
N--Ethyl-N--.beta.-methanesulfonamidoethyl-3- 
4 g 
methyl-4-aminoaniline sulfate 
Water was added to make 1 liter, and 
NaOH was added to make the pH 10.2. 
______________________________________ 
______________________________________ 
Bleach-Fixing Solution: 
______________________________________ 
Ammonium thiosulfate 124.5 g 
Sodium metabisulfite 13.3 g 
Anhydrous sodium sulfite 2.7 g 
EDTA ferric ammonium salt 
65 g 
Color developing solution (described 
100 ml 
above) 
pH was adjusted to 6.7 to 6.8 
Water to make 1 l 
______________________________________ 
The processing solutions used were those used for developing by means of a 
conventional roller transport type developing apparatus carrying out 
normal supplement, the composition of which reaches nearly to equilibrium. 
The densities of the thus-resulting Samples 1 to 5 were measured by means 
of a Fuji automatic densitometer, and the results are shown in Table 2. 
TABLE 2 
______________________________________ 
Density after 2 Days 
Sensitivity 
in the Case where 
of GL Layer 
Density D.sub.G in the 
Processed Case of Processing 
just after just after Exposure 
Sample No. 
Compound Exposure Is 1.0 
______________________________________ 
1 No addition 
100 0.71 
2 Compound 8 99 1.00 
(present 
invention) 
3 Compound 6 98 0.98 
(present 
invention) 
4 Compound 1 99 0.97 
(present 
invention) 
5 Comparative* 
102 0.93 
Compound A 
______________________________________ 
*Comparative Compound A: 
##STR9## 
As is obvious from Table 2, in Samples 2, 3 and 4 using Compounds 8, 6 and 
1 of the present invention, the sensitivity hardly varied, and the 
reduction of optical density, namely, the fading of latent images was 
scarcely observed even with a passage of time after exposure. 
REFERENCE EXAMPLE 
Samples 2 to 6 were produced by the same procedure as in Example 2, except 
that the comparative compound or the respective compounds of the present 
invention were added to the first layer of Sample 1 as shown in Table 3 
instead of to the third layer. 
The above-described samples were processed by the same procedure as in 
Example 2 after being preserved in a dark box at room temperature for 2 
days. In Samples 3 to 6, however, the sensitivity hardly varied, the 
density was not reduced by the passage of time, and the fading of latent 
images was scarcely observed. 
Further, above-described samples which were preserved at 35.degree. C. and 
80% RH for 2 weeks and ones which were preserved at room temperature for 2 
weeks were exposed to blue light through an optical wedge and processed by 
the same procedure as in Example 2. 
The results were as shown in Table 3. 
TABLE 3 
__________________________________________________________________________ 
Results of Process- 
ing after Preserva- 
tion at 35.degree. C. and 
Results of Processing after 
80% RH for 2 Weeks 
Preservation at Room 
Sensitivity 
Temperature for 2 Weeks 
Sample No. 
Compound 
(BL) Stain 
Sensitivity (BL) 
__________________________________________________________________________ 
1 No addition 
75 +0.07 
100 
2 Comparative 
95 +0.02 
110 
Compound A 
3 Compound 19 
97 +0.01 
108 
(present invention) 
4 Compound 11 
95 +0.02 
104 
(present invention) 
5 Compound 20 
96 +0.01 
106 
(present invention) 
6 Compound 6 
97 +0.01 
99 
(present invention) 
__________________________________________________________________________ 
As is understood from Table 3, the compounds of the present invention 
prevent the fading of latent images even with a passage of time after 
exposure and, also, provide the excellent preservation stability 
substantially equal to the comparative compound A. 
While the invention has been described in detail and with reference to 
specific embodiments thereof, it will be apparent to one skilled in the 
art that various changes and modifications can be made therein without 
departing from the spirit and scope thereof.