Color photographic light-sensitive material

A color photographic light-sensitive material is described, containing at least one light-sensitive silver halide emulsion layer and associated with at least one of said emulsion layer at least one dye-providing compound represented by the following general formula (I): ##STR1## wherein Q.sub.1, G, R.sub.1, R.sub.2, Q.sub.2, J.sub.1, J.sub.2, D, Z, X, Car, m and q are defined as herein. The color photographic light-sensitive material provides a transfer color image with a good hue and a good sharpness.

FIELD OF THE INVENTION 
This invention relates to a color photographic light-sensitive material 
and, more particularly, to a color diffusion transfer process photographic 
light-sensitive material containing a novel dye-providing compound. Still 
more particularly, it pertains to a light-sensitive sheet for a color 
diffusion transfer process containing a novel magenta dye-providing 
compound. 
BACKGROUND OF THE INVENTION 
Color diffusion transfer processes generally involve the use of a 
photographic element comprising a support, at least one silver halide 
emulsion layer, and a dye-providing compound which is contained in or 
contiguous to said layer. The dye-providing compound is typically 
represented by the chemical structural formula of Car-Dye [wherein Dye 
represents a dye moiety or a precursor thereof, and Car represents a 
moiety which, as a function of silver development under an alkaline 
contdition, forms or releases a substance (dye compound) having a mobility 
different from that of the dye-providing compound, and can be thought of 
as a carrier which may be attached to the dye moiety optionally through a 
linking ground]. This Car moiety brings about the change in mobility of 
the dye compound in proportion to development and, with dye-providing 
compounds that are diffusion-resistant even under alkaline conditions, 
diffusible dyes are released in proportion to the degree of development 
(i.e. according to a progress of developement or reverse progress of 
development) or are rendered soluble in proportion to the degree of 
development, and thus diffusible. In contrast, with dye-providing 
compounds which are diffusible under alkaline conditions, the dyes are 
rendered insoluble in proportion to the degree of development, and thus 
non-diffusible. Typical examples thereof are dye developers. 
As the typical examples of the former, there are dye-releasing redox 
compounds described in Japanese Patent Application (OPI) Nos. 33826/73 
(corresponding to U.S. Pat. No. 3,928,312), 114424/74, 126331/74, 
126332/74, 115528/75, 104343/76 (corresponding to U.S. Pat. No. 
4,198,235), U.S. Pat. No. 3,954,476, Research Disclosure, 13024 (1975) and 
16475 (1977). The term "dye-releasing redox compounds" as used herein 
means compounds wherein a group, called a redox parent nucleus 
(corresponding to the foregoing Car), and a dye moiety (including a 
precursor thereof) are attached to each other. The redox parent nucleus is 
initially immobilized by the function of a ballast group bound thereto 
and, upon redox reaction under alkaline conditions, undergoes cleavage to 
release a dye moiety-containing compound (dye compound). As a result, this 
dye compound diffuses into an image-receiving layer to form a transferred 
dye. (The term "OPI" as used herein refers to a published unexamined 
Japanese patent application.) 
Of the redox parent nuclei, there are those which are called 
"positive-working" type described in, for example, Japanese Patent 
Application (OPI) Nos. 110827/78, 110828/78, 164342/81, etc. Some release 
dye compounds in an inverse gradation to that of developed silver, i.e., 
inverse imagewise. 
As the dye-providing compounds, yellow dye-providing compounds, magenta 
dye-providing compounds, and cyan dye-providing compounds are known. 
Examples of the magenta dye-releasing redox compounds are described in 
Japanese Patent Application (OPI) Nos. 115528/75, 114424/74, U.S. Pat. 
Nos. 3932380, 3931144, etc. 
However, magenta dye-releasing redox compounds described in the preceding 
literature have the disadvantages that they show a poor color 
reproducibility, since the magenta dye-releasing redox compounds provide 
transfer images having insufficient hue, that they provide dyes having 
insufficient diffusibility to cause prolonged image-completing time, that 
they lower the efficiency of light absorption of an underlying 
red-sensitive emulsion (leading to reduction in sensitivity), since their 
spectral absorption in a coat before photographic processing expands to a 
longer wave-length region, and that they provide transfer images having 
poor sharpness. For example, with respect to the hue of the transfer 
image, the maximum absorption wave-length (.lambda.max) and the foot shape 
of absorption spectrum are of importance. As to absorption shifted to a 
shorter wave-length side fails to present dark red, whereas absorption 
shifted to a longer wave-length side fails to present bright red. As to 
the foog shape of absorption spectrum, broad absorption spectrum at the 
foot portion can reproduce only a stained color. It has been difficult to 
develop magenta dyes having an absorption spectrum with both suitable 
.lambda.max and a good foot shape, by conventionally known techniques. 
With respect to spectral absorption properties in coatings before 
photographic processing, conventionally known magenta dyes function as 
unfavorable filters for an underlying red-sensitive emulsion since they 
have a magenta color in the coatings, and therefore orange to yellow light 
rays of about 600 nm do not reach the red-sensitive emulsion. Thus, it is 
difficult to reproduce such color, and such color reduces sensitivity of 
red-sensitive emulsion and causes serious changes in color reproduction 
depending upon the color temperature of the light source used. 
It has heretofore been eagerly desired to solve or overcome these problems 
or defects at the same time. 
Japanese Patent Application (OPI) No. 4028/80 describes magenta 
dye-releasing redox compounds in which an amino group derivative is 
attached to a phenylene group bound to an azo group constituting a dye 
moiety and a redox parent nucleus is attached to the same phenylene group 
directly or through a linking group. The redox compounds are considerably 
excellent dye-providing compounds in that they form dyes that undergo less 
fading in darkness or by light, and they form dyes with good hue. However, 
this type of redox compounds have problems with synthesis adaptability and 
sharpness of the transfer dye image. Thus, these problems have been 
desired to be solved. 
SUMMARY OF THE INVENTION 
It is, therefore, an object of the present invention to provide magenta 
dye-providing compounds which give a transfer color image with a good hue 
(i.e., with maximum absorption in a suitable region and an absorption wave 
form having good foot shape). 
Another object of the present invention is to provide magenta dye-providing 
compounds having an absorption in a suitable region of wavelength in 
coatings prior to photographic processing. 
A further object of the present invention is to provide magenta 
dye-providing compounds which, as a function of development, form or 
release diffusible dye compounds having good diffusibility and provide 
transfer images having good sharpness. 
Still a further object of the present invention is to provide magenta 
dye-providing compounds having good synthesis adaptability. 
Still a further object of the present invention is to provide a silver 
halide color photographic light-sensitive material containing a magenta 
dye-providing compound with excellent properties as described above. 
As a result of intensive investigations, the inventors have found that 
these objects can be effectively attained by a color photographic 
light-sensitive material which has at least one light-sensitive silver 
halide emulsion layer, and in which at least one of said emulsion layers 
is associated with at least one dye-providing compound represented by the 
following general formula (I): 
##STR2## 
wherein Q.sub.1 represents a hydrogen atom, a halogen atom, a sulfamoyl 
group represented by --SO.sub.2 NR.sub.3 R.sub.4, an SO.sub.2 R.sub.a 
group, a COOR.sub.3 group or a --CONR.sub.3 R.sub.4 group, wherein R.sub.3 
and R.sub.4 may be the same as, or different from, each other and each 
represents a hydrogen atom or Ra and wherein Ra represents an alkyl group, 
a substituted alkyl group, an aralkyl group, a substituted aralkyl group, 
an aryl group or a substituted aryl group, or R.sub.3 and R.sub.4 may bind 
together directly or through a nitrogen or oxygen atom to form a ring; 
G represents a hydroxy group, a salt thereof, or --O--PR, wherein PR 
represents a protecting group for --O-- undergoing cleavage of the O--PR 
bond under alkaline conditions; 
R.sub.1 and R.sub.2 may be the same as, or different from, each other and 
each represents an alkyl group, a substituted alkyl group, an aryl group 
or a substituted aryl group, or R.sub.1 and R.sub.2 together represent 
atoms necessary for forming a 5- or 6-membered hetero ring; 
Q.sub.2 represents a sulfonic acid group, a salt thereof, or a sulfamoyl 
group represented by --SO.sub.2 NR.sub.5 R.sub.6, wherein R.sub.5 and 
R.sub.6 are the same as defined for R.sub.3 and R.sub.4 in Q.sub.1 ; 
J.sub.1 and J.sub.2 each represents a sulfonyl group or a carbonyl group; 
D represents a hydrogen atom, a halogen atom, a carboxyl group, a sulfo 
group, an alkyl group, a substituted alkyl group, an alkoxy group, a 
substituted alkoxy group, an aryl group, a substituted aryl group or an 
amino group represented by --NR.sub.7 R.sub.8, wherein R.sub.7 and R.sub.8 
are the same as defined for R.sub.3 and R.sub.4 on Q.sub.1 ; 
Z represents a hydrogen atom, an alkyl group or a substituted alkyl group; 
X represents a bivalent linking group of the formula --A.sub.1 --L.sub.n 
--(A.sub.2).sub.p --, wherein A.sub.1 and A.sub.2 may be the same or 
different and each represents an alkylene group, a substituted alkylene 
group, an aralkylene group, a substituted aralkylene group, a phenylene 
group or a substituted phenylene group, L represents a bivalent group 
selected from oxy, carbonyl, carboxyamido, carbamoyl, sulfonamido, 
sulfamoyl, sulfinyl and sulfonyl, and p and n each represents 0 or 1; 
m and q each represents 0 or 1; and 
Car represents a moiety which, as a function of silver development, forms 
or releases a substance having a mobility different from that of the 
dye-providing compound. 
DETAILED DESCRIPTION OF THE INVENTION 
In the above general formula (I), important structural features are that a 
substituted amino group (--NR.sub.1 R.sub.2) exists in an azobenzene ring, 
and that Car is attached to a phenylene or substituted phenylene group 
bound to --NHJ.sub.1 -- group at the 5-position of a naphthol ring. 
Existence of the amino group and attachment of Car to the 5-position of a 
naphthol ring are responsible for the remarkable improved effects, 
unexpected from the prior art, on hud of the transfer image, hue of the 
compounds in coatings before photographic processing (filter effect), 
diffusibility of released fye, sharpness of transfer image, and the 
compounds' good synthesis adaptability. 
As to the hue of transfer image, maximum absorption wave-length 
(.lambda.max) and foot shape of absorption spectrum (narrowness of the 
absorption spectrum) are improtant as preveiously mentioned. It is 
believed, based on calculations of the color reproducible region using a 
computer and accumulated data on actual photographing tests, that ideal 
magenta dyes have a .lambda.max between 550 and 555 nm. As to foot shape 
of absorption spectrum, conventional compounds have been desired to be 
much more improved. Prior art dyes have a well adjusted .lambda.max, but 
fail to show a good foot shape. On the other hand, the dyes of the present 
invention have a .lambda.max in an ideal position and show a good foot 
shape. In calculation of color reproducible regions using a computer and 
data on actual photographing tests, reproducible regions of blue and red, 
particularly red, are expanded by the use of the dye-providing compound of 
the present invention. Thus, the compounds of the present invention enable 
reproduction of vivid, clear, and bright color. 
In contrast, as has been previously mentioned, the color of the compound in 
coatings prior to photographic processing is also of importance in the 
point of sensitivity and color reproduction (spectral sensitivity) for an 
underlying red-sensitive emulsion, which is well known in the art as the 
"filtering effect". Conventional magenta dye-providing compounds absorb 
light rays of a considerably longer wavelength length region in coatings, 
and therefore absorb light rays of an orange region to which an underlying 
red-sensitive emulsion should respond. Thus, they provide poor color 
reproducibility in an orange region, show unfavorable dependence upon 
color temperature of a light source used, and seriously reduce 
sensitivity. Conventional magenta dye-providing compounds designed to 
absorb light rays of a shorter wavelength region in order to avoid 
absorption of the orange region light rays provide a transfer hue of a 
shorter wavelength region, thus being unsatisfactory. On the other hand, 
the magenta dye-providing compounds of the present invention absorb light 
rays of enough of the shorter wavelength region in coatings and, after 
diffusion transfer procedure, provide a transfer hue of enough of the 
longer wave-length region, thus solving the two extremely difficult 
problems with the conventional magenta dye-providing compounds. 
Superiority in both the transfer image hue and hue in coatings leads to 
the expansion of a color-reproducible region. 
As to diffusibility of dye, which is an extremely important factor for 
shortening the time required for appearance of an image or 
image-completing time (transfer rate), conventional dyes with an excellent 
diffusibility, provide poor sharpness of image (poor resolving power) 
though their transfer rate is fast. This may be attributed to the 
turbulence of mordantability in an image-receiving layer due to decreased 
mordantability. On the other hand, dyes released from the dye-providing 
compounds of the present invention show a fast transfer rate and provide 
good image sharpness, thus showing good mordantability for the good 
diffusibility. In this point, too, the magenta dye-providing compounds of 
the present invention have been found to possess excellent properties not 
expected from the prior art. 
As to synthesis adaptability, conventional techniques of linking Car to the 
azobenzene moiety have the disadvantage that the yield of the reaction of 
linking the dye moiety to the Car moiety is so low that synthesis of the 
dyes has been difficult. This low reaction yield is liable to leave 
unreacted dye moieties, which form water-soluble, colored impurities, 
causing a rise in minimum density (Dmin) of the transfer image. On the 
other hand, in the synthesis of the magenta dye-providing compounds of the 
present invention, reaction yield is so high that compounds with high 
quality can be easily obtained, which leads to a remarkable reduction in 
Dmin. 
As has been described above, photographic light-sensitive materials using 
the magenta dye-providing compounds of the present invention provide a 
transfer image of excellent hue, show high sensitivity and excellent color 
reproducibility, and give photographic pictures with low Dmin (less fog) 
due to the remarkable effects not expected from the prior art. 
The magenta dye-providing compounds of the present invention are described 
in more detail below. 
The group of 
##STR3## 
is preferably in the 4- or 6-position with respect to the azo group. The 
alkyl group represented by R.sub.1 and R.sub.2 may be straight, branched, 
or cyclic. Preferred examples thereof include alkyl groups containing 1 to 
6 (more preferably 1 to 4) carbon atoms and substituted alkyl groups such 
as those containing 1 to 10 (more preferably 1 to 5) carbon atoms and 
substituted by an alkoxy group, a halogen atom, a hydroxy group, an amino 
group, an alkylamino group, or the like (e.g., a methoxyethoxyethyl group, 
a methoxyethyl group, a chloroethyl group, etc.). The sum of the carbon 
atoms contained in R.sub.1 and R.sub.2 is preferably not more than 8. As 
the atoms necessary for forming a 5- or 6-membered hetero ring (when 
R.sub.1 and R.sub.2 are bound together), there are alkylene groups which 
can complete a 5- or 6-membered ring together with a nitrogen atom (e.g., 
piperidine, 2,6-dimethylpiperidine, pyrrolidine, etc.) and carbon chains 
containing an oxygen atom or a nitrogen atom (e.g., --CH.sub.2 CH.sub.2 
--O--CH.sub.2 CH.sub.2 --, --CH.sub.2 
CH(CH.sub.3)--O--CH(CH.sub.3)CH.sub.2 --, --CH(CH.sub.3)CH.sub.2 
--O--CH.sub.2 CH(CH.sub.3)--, --CH.sub.2 CH.sub.2 --N--CH.sub.2 CH.sub.2 
--, etc.). Particularly preferably, 
##STR4## 
represents a morpholino group. 
Where Q.sub.1 represents a sulfamoyl group of --SO.sub.2 NR.sub.3 R.sub.4, 
preferred examples of R.sub.3 and R.sub.4 include a hydrogen atom, an 
alkyl group containing 1 to 10 (more preferably 1 to 4) carbon atoms, a 
substituted alkyl group containing 1 to 10 (more preferably 1 to 4) carbon 
atoms in the alkyl moiety an aralkyl group preferably having 7 or 8 carbon 
atoms, a phenyl group, and substituted phenyl group containing 6 to 9 
carbon atoms, or R.sub.3 and R.sub.4 may be bound together to form a 5- or 
6-membered ring optionally including a nitrogen atom or an oxygen atom as 
previously mentioned for R.sub.1 and R.sub.2. Particularly preferably, at 
least one of R.sub.3 and R.sub.4 is branched (secondary or tertiary). The 
same applies to --CONR.sub.3 R.sub.4. As the substituents for the 
substituted alkyl group and the substituted aryl group, there are 
illustrated a hydroxy group, a hydroxyalkyl group, an alkyl group, an 
alkoxy group, an amino group, an alkylamino group, a hydroxyalkylamino 
group, a halogen atom, a cyano group, a sulfamoyl group (including 
N-substituted sulfamoyl groups), a carbamoyl group (including 
N-substituted carbamoyl groups) etc. Preferably Q.sub.1 represents a group 
of --SO.sub.2 NR.sub.3 R.sub.4 or a group of --CONR.sub.3 R.sub.4, and 
most preferably a group of --SO.sub.2 NR.sub.3 R.sub.4. 
Where Q.sub.2 represents a sulfamoyl group of --SO.sub.2 NR.sub.5 R.sub.6, 
the sum of the carbon atoms contained in R.sub.5 and R.sub.6 is preferably 
not more than 4, more preferably not more than 2. In view of obtaining 
high diffusibility of the dye, at least one of R.sub.3 and R.sub.4 
particularly preferably represents a hydrogen atom. 
Examples of G include a hydroxy group and a salt thereof such as an alkali 
metal salt (e.g., --O.sup..crclbar. Li.sup..sym., --O.sup..crclbar. 
K.sup..sym., --O.sup..crclbar. Na.sup..sym., etc.) or an ammonium salt 
(e.g., --O.sup..crclbar. NH.sub.4.sup..sym., --O.sup..crclbar. 
NHC(CH.sub.3).sub.3.sup..sym., --O.sup..crclbar. N(C.sub.2 
H.sub.5).sub.4.sup..sym., etc.). Further, G may be a hydrolyzable acyloxy 
group having a group represented by --O--PR such as 
##STR5## 
(wherein E represents an alkyl group, a substituted alkyl group, a phenyl 
group or a substituted phenyl group; substituents of substituted alkyl or 
phenyl group being selected from the previously mentioned substituents), 
may be a blocking group of intramolecular nucleophilic substitution type 
as described in Japanese Patent Application (OPI) No. 5330/80, or may be a 
blocking group described in Japanese Patent Application (OPI) No. 
158638/82, U.S. Pat. No. 3,698,898, etc. In short, those groups which are 
stable during storage and undergo rapid cleavage under alkaline conditions 
may be suitably used in the present invention. Preferably, G is a hydroxy 
group, an acyloxy group or 
##STR6## 
J.sub.1 and J.sub.2 each represents a sulfonyl group or a carbonyl group, 
preferably a sulfonyl group. 
Z represents a hydrogen atom, a substituted or unsubstituted alkyl group 
wherein alkyl moiety has 1 to 4 carbon atoms (substituents being, for 
example, those previously mentioned), particularly preferably a hydrogen 
atom. 
As the substituted arylene group of A.sub.1 or A.sub.2 for X, those which 
contain 6 to 12 carbon atoms are preferable. Specific examples thereof 
include substituted phenylene groups substituted by, for example, an 
alkoxy group having preferably 1 to 6 carbon atoms more preferably 1 to 4 
carbon atoms (e.g., a methoxy group, an ethoxy group, etc.), an 
alkoxyalkoxy group having preferably 3 to 6 carbon atoms, more preferably 
3 to 4 carbon atoms (e.g., a methoxyethoxy group, etc.), an alkyl group 
having preferably 1 to 6 carbon atoms, more preferably 1 to 4 carbon atoms 
(e.g., a methyl group, an ethyl group, etc.), an amino group and a 
substituted amino group which substituent is preferably an alkyl group 
having 1 to 4 carbon atoms and a group forming a morpholino group together 
with a nitrogen atom of the amino group. The substituents for the 
substituted phenylene groups may have two or more such substituents. 
Preferably, X is a phenylene group, a group of 
##STR7## 
or a substituted group of those having an alkoxyalkoxy group or a 
morpholino group as substituent. 
D preferably represents a substituent containing 6 or less carbon atoms or 
a hydrogen atom, particularly preferably a hydrogen atom. 
Preferable dye-providing compounds of the present invention are those in 
which n represents 1 and p represents 0 and, more preferably, q and m 
represent 1. However, taking diffusibility of released dye into 
consideration, m preferably represents 0. 
Car represents a moiety which, as a function of development, forms or 
releases a substance (dye compound or its precursor) having a mobility 
different from that of the starting dye-providing compound through a 
reduction reaction or other chemical reaction, and which may be a 
polyvalent metal complex, including a so-called "negative-working type" 
which undergoes cleavage as a result of oxidation caused by development of 
silver and "positive-working type" which undergo cleavage in portions 
where no development of silver has taken place and does not undergo 
cleavage in portions where development of silver has taken place. 
Car of any of the "negative-working type" and "positive-working type" is 
suited for the magenta dye-providing compounds of the present invention. 
The cleaved dye moiety terminal varies depending upon the kind of Car (for 
example, Dye-SO.sub.2 NH.sub.2, Dye-OH, Dye-NH.sub.2, etc.). However, 
whatever is the terminal of the cleaved dye, the dye-providing compounds 
of the present invention do not exert detrimental influences on a 
resulting hue since the terminal is spaced from the chromophore or 
auxochrome of the dye, which is one great aspect of the compounds. In 
contrast, a conventional structure wherein Car is attached to an 
azobenzene moiety as described in the general formula (I) of, for example, 
Japanese Patent Application (OPI) Nos. 4028/80, 161332/79 or 115528/75 
undergoes a serious change in hue by varying the terminal. In the 
structure of the present invention, the structure of the dye moiety can be 
selected independently from the kind of Car. 
Examples of negative-working Car are described in, for example, U.S. Pat. 
Nos. 4,135,929, 4,053,312, 4,336,322, Japanese Patent Application (OPI) 
Nos. 33826/73 (corresponding to U.S. Pat. No. 3,928,312), 104343/76 
(corresponding to U.S. Pat. No. 4,198,235), 46730/78, 130122/79, 113624/76 
(corresponding to U.S. Pat. No. 4,055,428), 12642/81, 16113/81, 4043/82, 
650/82, 20735/82, 54021/79, 71072/81, etc. Specific examples thereof 
include the following N-substituted sulfamoyl groups (the substituent 
being preferably an aryl group) which, however, do not limit the present 
invention in any way. 
##STR8## 
On the other hand, examples of positive-working Car are described in, for 
example, U.S. Pat. Nos. 4,199,354, 4,199,355, 4,139,379, 4,139,389, 
3,719,489, 4,098,783, Japanese Patent Application (OPI) Nos. 11628/74 
(corresponding to U.S. Pat. No. 3,421,964), 63618/76 (corresponding to 
U.S. Pat. No. 3,980,479), 69033/78, 130927/79, 164342/81, 4819/77 
(corresponding to U.S. Pat. No. 4,199,355), Japanese Patent Application 
No. 60289/83, etc. Of them, particularly preferred specific examples are 
those illustrated below which, however, do not limit the present invention 
in any way. 
##STR9## 
Of these positive-working dye-providing compounds, those which release dyes 
upon reduction, typically exemplified by having a quinone skeleton, are 
known to be used in combination with non-diffusible, electron donative 
compounds (well known as ED compounds) or their precursors. Examples of 
the ED compounds are described in, for example, U.S. Pat. Nos. 4,263,393, 
4,278,750, Japanese Patent Application (OPI) No. 138736/81, etc. 
Positive-working, dye-providing compounds of the present invention are 
suitably used in combination with the ED compounds. 
Also, the positive-working, dye-providing compounds may be those of the 
type which contain an electron-donative moiety within the molecule and 
release a dye by intramolecular oxidation-reduction reaction. 
Of the magenta dye-providing compounds of the present invention, typical 
examples of magenta dye-releasing redox compounds are illustrated below. 
______________________________________ 
##STR10## 
Compound No. R.sub.3 R.sub.4 
______________________________________ 
1 CH.sub.3 CH.sub.3 
2 C.sub.2 H.sub.5 
C.sub.2 H.sub.5 
3 C.sub.3 H.sub.7 n 
C.sub.3 H.sub.7 n 
4 C.sub.3 H.sub.7 iso 
C.sub.3 H.sub.7 iso 
5 C.sub.4 H.sub.9 iso 
C.sub.4 H.sub.9 iso 
6 C.sub.4 H.sub.9 tert 
H 
7 8 9 
##STR11## 
##STR12## 
______________________________________ 
##STR13## 
______________________________________ 
Y represents the following group; 
______________________________________ 
##STR14## 
Compound No. NR.sub.1 R.sub.2 
Q.sub.2 
______________________________________ 
10 P 
##STR15## m-SO.sub.2 NH.sub.2 
11 P 
##STR16## m-SO.sub.3 K 
12 P 
##STR17## m-SO.sub.2 NHCH.sub.3 
13 P 
##STR18## m-SO.sub.2 NH.sub.2 
14 P 
##STR19## m-SO.sub. 2 NH.sub.2 
15 O 
##STR20## m-SO.sub.2 NH.sub.2 
16 P 
##STR21## m-SO.sub.2 N(CH.sub.3).sub.2 
17 P 
##STR22## m-SO.sub.2 N(CH.sub.3).sub.2 
______________________________________ 
##STR23## 
Compound No. O 
______________________________________ 
17 
##STR24## 
18 4-CO.sub.2 H 
19 4-OCH.sub.3 
20 4-OCH.sub.2 CH.sub.2 OCH.sub.3 
______________________________________ 
Y' represents the following group; 
##STR25## 
Examples of synthesizing the compounds of the present invention are given 
below. 
SYNTHESIS EXAMPLE 1 
Synthesis of Compound 4 
(1) Synthesis of potassium 
3-{N-[6-(N,N-diisopropylsulfamoyl)-5-hydroxy-8-(4-morpholino-3-sulfamoylph 
enylazo)]naphthylsulfamoyl}benzenesulfonate: 
An aqueous solution of sodium nitrite (0.14 g of sodium nitrite in 2.5 ml 
of water) was added to a mixture of 0.48 g of 
3-amino-6-morpholinobenzenesulfonamide, 10 ml of methanol, 5 ml of water, 
and 0.5 ml of 35% hydrochloric acid under stirring at 5.degree. C. or 
lower than that, followed by stirring for 30 minutes to prepare a 
diazonium solution. 
This diazonium solution was added to a stirred mixture of 1.07 g of 
potassium 
3-{N-[6-(N,N-diisopropylsulfamoyl)-5-hydroxy]naphthylsulfamoyl}benzenesulf 
onate, 10 ml of methanol, 5 ml of methyl cellulose, a sodium hydroxide 
aqueous solution (0.074 g of sodium hydroxide in 5 ml of water), and 1 g 
of sodium acetate at 5.degree. C. or lower than that. After stirring the 
mixture for one hour, 10 ml of 35% hydrochloric acid was added thereto, 
and crystals formed were collected by filtration to obtain 1.15 g of the 
end product. 
(2) Synthesis of 
N,N-diisopropyl-[5-(3-chlorosulfonylbenzene)sulfonamido-1-hydroxy-4-(4-mor 
pholino-3-sulfamoylphenylazo)]-2-naphthalenesulfonamide 
6.5 ml of N,N-dimethylacetamide was dropwise added to a stirred mixture of 
13.5 g of the compound obtained in (1) described above, 130 ml of 
acetonitrile, and 13 ml of phosphorus oxychloride, then the resulting 
mixture was stirred for 90 minutes. The reaction solution was poured into 
650 ml of water, and crystals precipitated were collected by filtration to 
obtain 9.2 g of the end product. 
(3) Synthesis of Compound 4 
A mixture of 4.66 g of 2-amino-4-cyclohexyl-5-hexadecyloxyphenol 
hydrochloride, 30 ml of N,N-dimethylacetamide, and 5 ml of pyridine was 
stirred, and 8.3 g of the compound obtained in (2) described above was 
added thereto. After stirring for one hour, the solution was poured into 
200 ml of 5% hydrochloric acid, and crystals precipitated were collected 
by filtration. Column purification of the crystals using a developing 
solvent of chloroform/ethyl acetate (4/1) gave 4.0 g of the end product. 
SYNTHESIS EXAMPLE 2 
Synthesis of Compound 10 
A mixture of 10 g of a hydroquinone oxidant Compound 10, 100 ml of methyl 
chloride, and 5 g of manganese dioxide were stirred at room temperature 
for 2 hours. After removal of manganese dioxide using sellaite, the 
solution was concentrated to dryness. Purification of the residue by 
column chromatography using silica gel gave 3.2 g of the end product. 
Other compounds may be easily synthesized according to the above-described 
processes. 
The color photographic light-sensitive material of the present invention 
may be use in, for example, a thermal development process. 
Stratum structure and other additives suited for this process are described 
in Japanese Patent Application (OPI) No. 58543/83, etc. 
In adapting the color photographic light-sensitive material of the present 
invention to a color diffusion transfer photographic process, there may be 
employed a peel-apart type structure, an integrated structure as described 
in Japanese Patent Publication Nos. 16356/71 (corresponding to U.S. Pat. 
Nos. 3,415,645 and 3,415,646), 33697/73 (corresponding to U.S. Pat. No. 
3,594,167), Japanese Patent Application (OPI) No. 13040/75 (corresponding 
to U.S. Pat. No. 3,993,486), and BP No. 1330524, or a film unit structure 
which eliminates the peeling procedure as described in Japanese Patent 
Application (OPI) No. 119345/82 (corresponding to European Pat. No. 
53,328). Also, a structure or format of optionally delaminatable, 
integrated type film unit may also be employed (Japanese Patent 
Application (OPI) No. 67840/81, etc.). 
In any of the above-described formats, the use of a polymeric acid layer 
protected by a temporary barrier layer which shortens the neutralization 
timing period at high processing temperatures, such as fused latex polymer 
described in Japanese Patent Application (OPI) Nos. 145217/77 
(corresponding to U.S. Pat. No. 4,056,394), 72622/78 (corresponding to 
U.S. Pat. No. 4,199,362), 78130/79 (corresponding to U.S. Pat. No. 
4,250,243), 138432/79 (corresponding to U.S. Pat. No. 4,256,827), 138433 
(corresponding to U.S. Pat. No. 4,268,604), etc. or lactone 
ring-containing polymers disclosed in Japanese Patent Application (OPI) 
No. 54341/80 (corresponding to U.S. Pat. No. 4,229,516) or Research 
Disclosure Vol. 184, No. 18452 (1979), is advantageous in view of 
expanding the range of employable temperatures. 
Light-sensitive silver halide emulsions to be used in the present invention 
are hydrophilic colloidal dispersions of silver chloride, silver bromide, 
silver chlorobromide, silver bromoiodide, silver chlorobromoiodide or a 
mixture thereof. The halide composition is selected depending upon the 
end-use and processing conditions of a particular light-sensitive 
material, but silver bromide, silver bromoiodide or silver 
chlorobromoiodide containing 10 mol% or less iodide and 30 mol% or less 
bromide is particularly preferred. 
In the present invention, either of negative emulsions forming a surface 
latent image and direct reversal emulsions may be used. As the latter type 
of emulsions, there are internal latent image-forming emulsions and 
previously fogged direct reversal emulsions: 
Internal latent image-forming silver halide emulsions are advantageously 
used in the present invention. As this type emulsions, there are 
illustrated, for example, conversion type emulsions described in U.S. Pat. 
Nos. 2,592,250, 3,206,313, 3,447,927, 3,761,276, 3,935,014, etc., 
core/shell type emulsions, and emulsions containing foreign metals. 
Typical examples of nucleating agents for these types of emulsions are 
hydrazines described in U.S. Pat. Nos. 2,588,982 and 2,563,785; hydrazides 
and hydrazones described in U.S. Pat. No. 3,227,552; quaternary salt 
compounds described in BP No. 1283835, Japanese Patent Publication No. 
38164/74, U.S. Pat. Nos. 4,115,122, 3,734,738, 3,719,494, and 3,615,615; 
sensitizing dyes having a nucleating substituent in the dye molecule are 
described in U.S. Pat. No. 3,718,470; and thiourea-attached acylhydrazine 
compounds described in U.S. Pat. Nos. 4,030,925, 4,031,127, 4,245,037, 
4,255,511, 4,266,013, 4,276,364, etc. 
The silver halide emulsion to be used in the present invention may have, if 
desired, a color sensitivity expanded with a spectrally sensitizing dye. 
As the spectrally sensitizing dyes, cyanine dyes, merocyanine dyes, etc. 
may properly be used. 
As the dyes to be formed from the yellow and cyan dye-providing compounds 
and to be used in the present invention may be completed dyes or dye 
precursors capable of being converted to dyes in photographic processing 
steps or additional processing steps. Final image dyes may or may not be 
chelated with metals. As typical yellow and cyan dye structures useful in 
the present invention, there are illustrated azo dyes, azomethine dyes, 
anthraquinone dyes, phthalocyanine dyes, triphenylmethane dyes, indigoid 
dyes, etc. which may or may not be chelated with metals. 
Specific examples of yellow dye-providing compounds usable in the present 
invention are described in U.S. Pat. Nos. 3,597,200, 3,309,199, 4,013,633, 
4,245,028, 4,156,609, 4,139,383, 4,195,992, 4,148,641, 4,148,643, 
4,336,322, Japanese Patent Application (OPI) Nos. 114930/76 and 71072/81, 
Research Disclosure 17630 (1978), ibid., 16475 (1977), etc. 
Specific examples of cyan dye-providing compounds usable in the present 
invention are described in U.S. Pat. Nos. 3,482,972, 3,929,760, 4,013,635, 
4,268,625, 4,171,220, 4,242,435, 4,142,891, 4,195,994, 4,147,544, 
4,148,642, BP 1,551,138, Japanese Patent Application (OPI) Nos. 99431/79, 
8827/77, 47823/78, 143323/78, 99431/79, 71061/81, European Pat. Nos. (EPC) 
53037 and 53040, Research Disclosure 17630 (1978), ibid., 16475 (1975), 
and ibid., 16475 (1977). 
Dye-providing compounds having a dye moiety whose light absorption in a 
light-sensitive element is temporarily shifted may also be used as a kind 
of dye precursor, and specific examples thereof are described in Japanese 
Patent Application (OPI) Nos. 53330/80 and 53329/80, U.S. Pat. Nos. 
3,336,287, 3,579,334 and 3,982,946, and British Pat. No. 1,467,317. 
The dye-providing compounds are coated in amounts of 1.times.10.sup.-4 to 
1.times.10.sup.-2 mol/m.sup.2, preferably 2.times.10.sup.-4 to 
2.times.10.sup.-3 mol/m.sup.2. 
The dye-providing compounds to be used in the present invention may be 
dispersed in a hydrophilic colloid in various manners depending upon their 
types. For example, compounds having a dissociative group such as a sulfo 
group or a carboxy group may be dispersed by dissolving them in water or 
an alkaline aqueous solution, and adding the resulting solution to a 
hydrophilic colloid solution. On the other hand, compounds which are 
difficult to solubilize in an aqueous medium and readily soluble in 
organic solvents may be dispersed by the following processes. 
(1) A process of dissolving the compound in a substantially 
water-insoluble, high-boiling solvent, and adding the resulting solution 
to a hydrophilic colloidal solution to disperse. This process is described 
in, for example, U.S. Pat. Nos. 2,322,027, 2,533,514, and 2,801,171. If 
necessary, a low-boiling solvent or a readily water-soluble organic 
solvent may be used. These solvents are removed by vaporization through 
drying or by washing with water. 
(2) A process of dissolving the compound in a water-miscible solvent, and 
dispersing the resulting solution in a hydrophilic colloidal solution. 
(3) A process of using an oleophilic polymer in place of, or in combination 
with, the high-boiling solvent used in (1). This process is described in, 
for example, U.S. Pat. No. 3,619,195 and West German Pat. No. 1,957,467. 
(4) A process of dissolving the compound in a water-miscible solvent, and 
gradually adding to this solution an aqueous latex to obtain a dispersion 
wherein the compound is contained in latex particles. This process is 
described in, for example, Japanese Patent Application (OPI) No. 59943/76. 
In addition, oleophilic polymer hydrosols described in, for example, 
Japanese Patent Publication No. 39835/76 may be added to the hydrophilic 
colloidal dispersion obtained above. 
Dispersing of the dye-providing compound is effectively conducted by using 
a surfactant as an emulsifying aid. Useful surfactants are described in, 
for example, foregoing patents and Japanese Patent Publication No. 4923/64 
and U.S. Pat. No. 3,676,141. 
As the hydrophilic colloids to be used for dispersing the dye-providing 
compounds used in the present invention, there are illustrated, for 
example, gelatin, colloidal albumin, casein, cellulose derivatives (e.g., 
carboxymethyl cellulose, hydroxyethyl cellulose, etc.), sugar derivatives 
(e.g., agar-agar, sodium alginate, starch derivative, etc.), synthetic 
hydrophilic colloids (e.g., polyvinyl alcohol, poly-N-vinylpyrrolidone, 
polyacrylic acid copolymer, polyacrylamide, and their derivatives (e.g., 
partially hydrolyzed products). If necessary, a compatible mixture of two 
or more of these colloids may be used. Of these, gelatin is most popularly 
used. Gelatin may be replaced, wholly or partly, by a synthetic colloid. 
The process for obtaining a color diffusion transfer image using the 
dye-providing compounds is described in "Photographic Science and 
Engineering", vol. 20, No. 4, pp. 155-164, July/August 1976. 
In the above-described process, any silver halide-developing agent may be 
used that can cross-oxidize the dye-providing compound. Such developing 
agent may be incorporated in an alkaline processing composition or in a 
proper layer of a photographic element. Examples of developing agents 
usable in the present invention are as follows: hydroquinones described in 
Japanese Patent Application (OPI) No. 16131/81, aminophenols, 
phenylenediamines, pyrazolidinones (e.g., phenidone, 
1-phenyl-3-pyrazolidinone, dimezone 
(1-phenyl-4,4-dimethyl-3-pyrazolidinone), 
1-p-tolyl-4-methyl-4-hydroxymethyl-3-pyrazolidinone, 
1-(4'-methoxyphenyl)-4-methyl-4-hydroxymethyl-3-pyrazolidinone, 
1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidinone, etc.), etc. 
Of these, black-and-white developing agents (particularly, pyrazolidinones) 
generally having the properties of decreasing stain formation in an 
image-receiving layer are more preferable than color developing agents 
such as phenylenediamines. 
The processing composition to be used for processing the photographic 
light-sensitive material of the present invention contains base such as 
sodium hydroxide, potassium hydroxide, sodium carbonate or sodium 
phosphate and suitably possesses a pH of about 9 or more, preferably 11.5 
or more. It may contain an antioxidant such as sodium sulfite, ascorbic 
acid salt, piperidinohexose reductone, etc. and may contain a silver ion 
concentration-adjusting agent such as potassium bromide. In addition, a 
viscosity-increasing compound such as hydroxyethyl cellulose or sodium 
salt of carboxymethyl cellulose may also be incorporated. 
Compounds with the effect of accelerating development or diffusion of dye, 
such as benzyl alcohol, may be incorporated in the alkaline processing 
composition. 
In the reproduction of natural color by subtractive color photography, a 
light-sensitive material comprising at least two combinations of an 
emulsion having a selective sensitivity in a certain wave-length region 
and a dye-providing compound having a selective spectral absorption in the 
same wave-length region is used. 
Particularly, light-sensitive materials comprising a combination of a 
blue-sensitive silver halide emulsion and a yellow dye-providing compound, 
a combination of a green-sensitive emulsion and a magenta dye-providing 
compound, and a combination of a red-sensitive emulsion and a cyan 
dye-providing compound are useful. These combination units of emulsion and 
dye-providing compound may be coated in layers in face-to-face 
relationship in a light-sensitive material, or may be formed into 
particles (dye-providing compound and silver halide grains being in the 
same particles) and be coated as a single layer in a mixed state. 
A spacer layer may be provided between an interlayer and a layer containing 
a dye-providing compound as described in Japanese Patent Application (OPI) 
No. 52056/80. Also, a silver halide emulsion may be added to the 
interlayer as described in Japanese Patent Application (OPI) No. 67850/81. 
As a mordanting layer, a neutralizing layer, a neutralization 
rate-controlling layer (timing layer), a processing composition, etc. to 
be used for the color diffusion transfer process light-sensitive materials 
of the present invention, those described in, for example, Japanese Patent 
Application (OPI) No. 64533/77 may be applied. 
The polymeric mordants to be used in the present invention are polymers 
containing secondary and tertiary amino groups, polymers containing 
N-containing hetero ring moieties, and polymers containing quaternary 
cation groups thereof, having a molecular weight of not less than 5,000, 
particularly preferably not less than 10,000. 
For example, there are illustrated vinylpyridine polymers and 
vinylpyridinium cationic polymers disclosed in U.S. Pat. Nos. 2,548,564, 
2,484,430, 3,148,061, 3,756,814, etc.; vinylimidazolium cationic polymers 
disclosed in U.S. Pat. No. 4,124,386, etc.; polymeric mordants 
cross-linkable with gelatin or the like, disclosed in U.S. Pat. Nos. 
3,625,694, 3,859,096, 4,128,538, British Pat. No. 1,277,453, etc.; aqueous 
sol type mordants disclosed in U.S. Pat. Nos. 3,958,995, 2,721,852, 
2,798,063, Japanese Patent Application (OPI) Nos. 115228/79, 145529/79, 
126027/79, 155835/79, 17352/81, etc.; water-insoluble mordants disclosed 
in U.S. Pat. No. 3,898,088, etc.; reactive mordants capable of forming a 
covalent bond with dyes, disclosed in U.S. Pat. Nos. 4,168,976, 4,201,840, 
etc.; and mordants disclosed in U.S. Pat. Nos. 3,709,690, 3,788,855, 
3,642,482, 3,488,706, 3,557,066, 3,271,147, 3,271,148, Japanese Patent 
Application (OPI) Nos. 30328/78, 15552/77, 125/78, 1024/78, 107835/78, 
British Pat. No. 2,064,802, etc. 
In addition, those mordants which are described in U.S. Pat. Nos. 2,675,316 
and 2,882,156 are also illustrated. 
In addition to the foregoing formats, the color photographic 
light-sensitive material to be used in the present invention may be used 
in a system of tank-developing a light-sensitive sheet having no 
image-receiving layer to dissolve away soluble dye compounds and utilize 
remianing insoluble (non-diffusible) dye compounds. Therefore, the present 
invention may be applied to any system as long as diffusion of dye is 
utilized. Of course, it may be applied to conventional color photography. 
The present invention will now be described in more detail by the following 
non-limiting examples of preferred embodiments of the present invention.

EXAMPLE 1 
Light-sensitive sheets, image-receiving sheets, and processing solution 
were prepared as follows. Preparation of light-sensitive sheets: 
On a polyethylene terephthalate transparent support were coated, in 
sequence, the following layers. 
(1) A layer containing a magenta dye-releasing redox compound of the 
following structure (2.times.10.sup.-4 mol/m.sup.2) tricyclohexyl 
phosphate (0.08 g/m.sup.2), 2,5-di-tert-pentadecylhydroquinone (0.005 
g/m.sup.2), and gelatin (0.5 g/m.sup.2). 
(2) A layer containing a silver halide emulsion (0.82 g Ag/m.sup.2) and 
gelatin (0.9 g/m.sup.2). 
(3) A protective layer containing gelatin (0.5 g/m.sup.2). 
Preparation of image-receiving sheets: 
On a polyethylene terephthalate transparent support was coated an 
image-receiving layer containing 3.0 g/m.sup.2 of 
copoly[styrene-N-vinylbenzyl-N-methylpiperidinium chloride] and 3.0 
g/m.sup.2 of gelatin. 
Formulation of processing solution: 
______________________________________ 
1-p-Tolyl-4-hydroxymethyl-4-methyl- 
10 g 
3-pyrazolidone 
Methylhydroquinone 0.3 g 
5-Methylbenzotriazole 3.5 g 
Sodium sulfite (anhydrous) 
0.2 g 
Na salt of carboxymethyl cellulose 
58 g 
Potassium hydroxide (28% aq. soln.) 
200 cc 
Benzyl alcohol 1.5 cc 
Carbon black 150 g 
Water 685 cc 
______________________________________ 
Each of light-sensitive sheets No. 1 to No. 6 was exposed to give a maximum 
density, then superimposed on the image-receiving sheet. The assembly was 
passed through a pair of pressure-applying rollers to uniformly spread the 
above-described processing solution between the two sheets and, after ten 
minutes, the image-receiving sheet was peeled apart, dipped in a 2% acetic 
acid solution, then well washed with water. The image-receiving layer was 
then dipped in MacIlvain's Buffer of pH 5 and air-dried. On this occasion, 
all image-receiving sheets were uniform and had no stains. Spectral 
absorption in the visible region of each image-receiving sheet was 
measured by means of a karry spectrophotometer. In this occasion, a 
non-processed image-receiving sheet was used as a comparative control. 
Results thus obtained are shown in Table 1 (hue of transfer image). 
On the other hand, non-processed light-sensitive sheets No. 1 to No. 6 were 
dipped in a fixing solution (30% sodium thiosulfate aqueous solution) for 
15 minutes to remove silver, well washed with water, and dried. Spectral 
absorption in the visible region of each of these samples No. 1 to No. 6 
was measured in the above-described manner. Results thus obtained are also 
given in Table 1 (absorption of coat). 
As is clear from Table 1, magenta dye-releasing redox compounds of the 
present invention provided transfer images having suitable .lambda.max and 
extremely good bottom shape of absorption wave, thus having excellent hud, 
and absorption of the compounds in a coat is in a sufficiently short 
wave-length region. Thus, inconsistent hud problems with the prior art are 
simultaneously solved. 
TABLE 1 
______________________________________ 
Hue of Transfer Image 
Absorption of Coat 
Sam- Com- Half 4/1 Filter Effect on 
ple pound Band Band Longer Wave- 
No. No. .lambda.max 
Width* 
Width* 
.lambda.max 
Length End*** 
______________________________________ 
1 2 548 86 115 520 565*.sup.1 
2 4 552 85 114 524 569*.sup.1 
3 10 + 552 85 114 524 568*.sup.1 
C**** 
4 13 + 553 85 114 523 568*.sup.1 
C 
5 21 + 542 89 117 535 572*.sup.1 
C 
6 A 559 95 127 549 588*.sup.2 
7 B 540 97 125 538 578*.sup.2 
______________________________________ 
*: Half bandwidth: bandwidth in nm at onehalf the peak density 
**: 1/4 Bandwidth: bandwidth in nm at 1/4 the peak density 
***: wavelength at which absorption of longer wavelength end is 0.5 (the 
shorter, the better). 
****: Compound C was used in an amount equimolar to that of the 
dyeproviding compound. 
*.sup.1 present invention 
*.sup.2 comparative compound 
##STR26## 
EXAMPLE 2 
An integral color diffusion transfer photographic light-sensitive sheet and 
a cover sheet were prepared as follows. 
Preparation of light-sensitive sheet 
On a polyethylene terephthalate transparent support were coated, in 
sequence, the following layers to prepare light-sensitive sheets 8 to 11. 
(1) An image-receiving layer containing 3.0 g/m.sup.2 of 
copoly-[styrene-N-vinylbenzyl-N-methyl-piperidinium chloride] and 3.0 
g/m.sup.2 of gelatin. 
(2) A white reflecting layer containing 20 g/m.sup.2 of titanium dioxide 
and 2.0 g/m.sup.2 of gelatin. 
(3) A light barrier layer containing 2.0 g/m.sup.2 of carbon black and 1.5 
g/m.sup.2 of gelatin. 
(4) A layer containing 0.44 g/m.sup.2 of a cyan dye-releasing redox 
compound of the following formula, 0.09 g/m.sup.2 of tricyclohexyl 
phosphate, 0.008 g/m.sup.2 of 2,5-di-t-pentadecylhydroquinone, and 0.8 
g/m.sup.2 of gelatin. 
##STR27## 
(5) A red-sensitive emulsion layer containing a red-sensitive, internal 
latent image-forming direct positive silver bromide emulsion (1.03 g 
Ag/m.sup.2), 1.2 g/m.sup.2 of gelatin, 0.04 mg/m.sup.2 of a nucleating 
agent of the following formula, and 0.13 g/m.sup.2 of 
2-sulfo-5-n-pentadecylhydroquinone sodium salt. 
##STR28## 
(6) A layer containing 0.43 g/m.sup.2 of 2,5-di-t-pentadecylhydroquinone, 
0.1 g/m.sup.2 of trihexyl phosphate, and 0.4 g/m.sup.2 of gelatin. 
(7) A layer containing 3.0.times.10.sup.-4 mol/m.sup.2 of a magenta 
dye-releasing redox compound shown in Table 2, tricyclohexyl phosphate 
(0.08 g/m.sup.2), 2,5-di-tert-pentadecylhydroquinone (0.009 g/m.sup.2), 
and gelatin (0.5 g/m.sup.2). 
(8) A green-sensitive emulsion layer containing a green-sensitive internal 
latent image-forming direct positive type silver bromide emulsion (0.82 g 
Ag/m.sup.2), gelatin (0.9 g/m.sup.2), the same nucleating agent as in 
layer (5) (0.03 mg/m.sup.2), and 2-sulfo-5-n-pentadecylhydroquinone sodium 
salt (0.08 g/m.sup.2). 
(9) The same layer as (6). 
(10) A layer containing a yellow dye-releasing redox compound of the 
following structure (0.53 g/m.sup.2), tricyclohexyl phosphate (0.13 
g/m.sup.2), 2,5-di-t-pentadecylhydroquinone (0.014 g/m.sup.2), and gelatin 
(0.7 g/m.sup.2). 
##STR29## 
(11) A blue-sensitive emulsion layer containing a blue-sensitive, internal 
latent image-forming direct positive silver bromide emulsion (1.09 g 
Ag/m.sup.2), gelatin (1.1 g/m.sup.2), the same nucleating agent as in 
layer (5) (0.04 mg/m.sup.2), and 2-sulfo-5-n-pentadecylhydroquinone sodium 
salt (0.07 g/m.sup.2). 
(12) An ultraviolet ray-absorbing layer containing the following UV ray 
absorbents both in amounts of 4.times.10 mol/m.sup.2, and 0.30 g/m.sup.2 
of gelatin. 
##STR30## 
(13) A protective layer containing polymethyl methacrylate latex (mean 
particle size: 4.mu.; 0.10 g/m.sup.2), gelatin (0.8 g/m.sup.2), and a 
hardener of triacryloyltriazine (0.02 g/m.sup.2). 
Preparation of cover sheet: 
On a transparent polyethylene terephthalate support were coated, in 
sequence, the following layers (1') to (3') to prepare a cover sheet. 
(1') A layer containing a copolymer of acrylic acid/butyl acrylate (80/20 
by weight) (22 g/m.sup.2) and 1,4-bis(2,3-epoxypropoxy)-butane (0.44 
g/m.sup.2). 
(2') A layer containing acetyl cellulose (39.4 g of acetyl group being 
produced by hydrolysis of 100 g of acetyl cellulose) (3.8 g/m.sup.2), a 
copolymer of styrene/maleic anhydride (60/40 by weight) (molecular weight: 
about 50,000) ring-opened with methanol (0.23 g/m.sup.2), and 
5-(2-cyano-1-methylethylthio)-1-phenyltetrazole (0.154 g/m.sup.2). 
(3') A 2-.mu. thick layer formed by coating a mixture of a styrene/n-butyl 
acrylate/acrylic acid/N-methylol acrylamide (49.7/42.3/3/5 by weight) 
copolymer latex and a methyl methacrylate/acrylic acid/N-methylol 
acrylamide (93/4/3 by weight) copolymer latex (solid ratio of the former 
latex to the latter latex being 6:4). 
Each of the thus prepared light-sensitive sheets 8 to 11 was processed by 
spreading the processing solution used in Example 1 using the cover sheet 
and with the aid of rollers. Additionally, the sheets were previously 
exposed to red light to give D.sub.B of 1.7, D.sub.G of 2.1, and D.sub.R 
of 0.25 (Dmin). The thus obtained "red" was observed to evaluate the hue. 
The results thus obtained are given in Table 2. 
Next, light-sensitive sheets 8 to 11 were exposed using a continuous wedge, 
and processed by spreading the processing solution in the same manner as 
described above, followed by measuring density using a color densitometer. 
Dmax values and sensitivities were read from the data and tabulated in 
Table 2. Sensitivity was relatively compared with respect to the point of 
D=1.0. 
Each of light-sensitive sheets 8 to 11 was located in a camera, and 
photographing procedure was repeated under a light source of a 
4,800.degree. K. tungsten lamp to determine, with each sample, a 
photographing filter for correctly reproducing gray gradation. 
Subsequently, the light source was changed to a white fluorescent lamp 
with maintaining the conditions for respective light-sensitive materials, 
and photographing procedure was conducted, followed by the same spreading 
procedure. Results of evaluating color reproduction by observation of the 
samples are tabulated in Table 2. 
As is clear from Table 2, light-sensitive materials using the magenta 
dye-releasing redox compounds of the present invention have remarkably 
improved effects in the following points: 
(1) red hue is markedly excellent, and a vivid and clean, ideal red color 
can be reproduced; 
(2) sensitivity of a red-sensitive emulsion is high; and 
(3) resulting images are not tinted with cyan even under a fluorescent 
lamp, and good color can be reproduced for a wide variety of light 
sources. 
TABLE 2 
__________________________________________________________________________ 
Cyan Sensitivity 
Tint Obtained by 
Sample 
Compound (S.sub.1.0)* Differ- 
Photographing under 
No. No. Tint of Red 
ence from Yellow 
Fluorescent Lamp** 
__________________________________________________________________________ 
8 4 true red, 
+0.10 slightly tinted 
present 
vivid and clear with cyan invention 
9 5 true red, 
+0.12 slightly tinted 
present 
vivid and clear with cyan invention 
10 A dark red, 
-0.12 strongly tinted 
for 
turbid red with cyan comparison 
11 B vermilion, 
0 strongly tinted 
for 
weak with cyan comparison 
__________________________________________________________________________ 
*The greater the value, the better the sample. 
**Grayish tint is preferred. 
EXAMPLE 3 
Transfer rate and sharpness (MTF; Modular Transfer Function; see T. James, 
"The Theory of Photographic Process", 4th. Edition, Mcmillan, New York, 
pp. 604-607) were measured with each light-sensitive sheet prepared in 
Example 2. 
G density change versus time was measured starting from immediately after 
spread-processing of light-sensitive sheets 8 to 11 using a Macbeth 
densitometer, and time required for the density to reach 50% of final 
density was determined. The results are tabulated in Table 3. 
Then, light-sensitive sheets 8 to 11 were exposed through a 
frequency-varied wedge for testing resolving power, processed by spreading 
the processing solution, then subjected to microdensitometry. Space 
frequency at which MTF of magenta was 0.5 was determined from the thus 
obtained data, and was tabulated in Table 3. 
It is seen from Table 3 that light-sensitive sheets of the present 
invention showed fast transfer rate and excellent sharpness as compared 
with conventional sheets. 
TABLE 3 
______________________________________ 
Transfer Rate* 
Light- Com- (Time Required 
sensitive 
pound for Attaining 
Sharpness** 
Sheet No. 
No. 50% Density) 
(MTF 50%) 
______________________________________ 
8 4 40 sec. 5.0 lines/mm 
present 
invention 
9 5 42 sec. 6.1 present 
invention 
10 A 48 sec. 4.7 for 
comparison 
11 B 47 sec. 4.5 for 
comparison 
______________________________________ 
*The shorter the time, the faster the rate. 
**Greater value means better sharpness. 
EXAMPLE 4 
Peel-apart type color diffusion transfer light-sensitive sheets and 
image-receiving sheets were prepared as follows. 
Preparation of light-sensitive sheet: 
On a polyethylene terephthalate support were coated, in sequence, the 
following layers to prepare light-sensitive sheets 12 to 16. 
(1) A layer containing 1.times.10.sup.-4 mol/m.sup.2 of a cyan 
dye-providing compound shown below, 1.times.10.sup.-4 mol/m.sup.2 of 
compound C (ED compound), 0.1 g/m.sup.2 of N,N-diethyllaurylamide, and 0.8 
g/m.sup.2 of gelatin. 
##STR31## 
(2) A red-sensitive silver bromide emulsion layer (a layer containing 0.6 
g silver/m.sup.2 and 0.6 g/m.sup.2 of gelatin). 
(3) A layer containing 0.5 g/m.sup.2 of 2,5-di-t-pentadecylhydroquinone and 
0.4 g/m.sup.2 of gelatin. 
(4) A layer containing 2.times.10.sup.-4 mol/m.sup.2 of a magenta 
dye-providing compound shown in Table 4, 2.times.10.sup.-4 mol/m.sup.2 of 
compound C (an ED compound), 0.1 g/m.sup.2 of N,N-diethyllaurylamide, and 
0.8 g/m.sup.2 of gelatin. 
(5) A green-sensitive silver bromide emulsion layer (a layer containing 0.6 
g silver/m.sup.2 and 0.4 g/m.sup.2 of gelatin). 
(6) The same layer as layer (3). 
(7) A layer containing 3.times.10.sup.-4 mol/m.sup.2 of the following 
yellow dye-providing compound, 3.times.10.sup.-4 mol/m.sup.2 of compound C 
(an ED compound), 0.1 g/m.sup.2 of N,N-diethyllaurylamide, and 0.8 
g/m.sup.2 of gelatin. 
##STR32## 
(8) A blue-sensitive silver bromide emulsion layer (a layer containing 0.6 
g/m.sup.2 of silver and 0.4 g/m.sup.2 of gelatin). 
(9) The same layer as layer (12) in Example 2. 
(10) The same layer as layer (13) in Example 2. 
Preparation of image-receiving sheet: 
Reflective, image-receiving sheets were prepared by coating, in sequence, 
the following layers on a white paper support. 
(1') A neutralizing layer containing a copolymer of acrylic acid/butyl 
acrylate (80/20 by weight) (10 g/m.sup.2) and 
1,4-bis(2,3-epoxypropoxy-butane (0.3 g/m.sup.2). 
(2') A neutralization timing layer containing 3.8 g/m.sup.2 of acetyl 
cellulose (hydrolysis of 100 g of the acetyl cellulose yielding 39.4 g of 
acetyl group) and 5-(2-cyano-1-methylethylthio)-1-phenyltetrazole (0.15 
g/m.sup.2). 
(3') An image-receiving layer containing 3.0 g/m.sup.2 of 
copoly[styrene/N-vinylbenzyl-N-methyl-piperidinium chloride] and 3.0 
g/m.sup.2 of gelatin. 
(4') A protective layer containing 0.15 g/m.sup.2 of gelatin. 
The thus prepared light-sensitive sheets 12 to 16 were exposed through a 
red, blue or green filter with gray gradation, then spread-processed 
between rollers using the same processing solution as used in Example 1. 
After two minutes, the image-receiving sheets were peeled apart to obtain 
images with good color separation (red, blue, and green) and good gray 
gradation. Red color reproduction was particularly excellent, vivid and 
clean red color being reproduced. Maximum densities (Dmax) and minimum 
densities (Dmin) of respective samples are shown in Table 4. 
TABLE 4 
______________________________________ 
Magenta Dye- 
Sample 
providing Dmax Dmin 
No. Compound B G R B G R 
______________________________________ 
12 10 1.72 2.15 2.30 0.10 0.12 0.15 
13 13 1.69 2.15 2.31 0.10 0.12 0.15 
14 17 1.71 2.10 2.28 0.10 0.12 0.15 
15 20 1.75 2.27 2.29 0.10 0.13 0.16 
16 24* 1.77 2.05 2.30 0.11 0.12 0.15 
______________________________________ 
*With lightsensitive sheet 16 using magenta dyeproviding compound 24, no 
ED compound (Compound C) was incorporated. 
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 
from the spirit and scope thereof.