Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Reexamination Certificate
2003-10-10
2004-11-30
Letscher, Geraldine (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
C430S502000, C430S503000, C430S504000, C430S508000, C430S379000
Reexamination Certificate
active
06824968
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2002-299509, filed Oct. 11, 2002, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a color reversal photographic light-sensitive material having an improved color reproduction, and particularly to a color reversal photographic light-sensitive material which is superior in skin color reproduction and in faithful color reproduction and which shows a slight change with respect to light and shade of an object and to variation in exposure. Moreover, the present invention relates to a color reversal-photographic light-sensitive material improved in adaptability for various light sources and in color temperature dependency of light source.
2. Description of the Related Art
For color reversal photographic light-sensitive materials, the color reproduction is an important feature. Heretofore, there have been made many attempts to improve the color reproduction, such as correction of side absorption of coloring materials by means of masking and utilization of an interimage effect.
In particular, the reproduction of “skin color” is important in the field of fashion portrait photographing and it has been required to be improved.
However, in the reproduction of the color of the human skin, there is some difference between the real skin color and a skin color favorable to be reproduced. For example, although a normal skin color is desired to have a chroma higher than the real tone, it is preferable that no defects such as pimples be noticeable. It, therefore, is not necessarily proper to reproduce the real tone of the skin faithfully. Moreover, the human eyes are very sensitive to skin color and can recognize a slight color difference in skin color, which difference would not be noticed in case of a normal color. Accordingly, the reproduction of skin color has some difficulty due to the necessity for an extremely precise control of color reproduction.
As a technology for improving the reproduction of skin color, disclosed is a color reversal photographic element comprising interimage effect controlling means, which element can reproduce a red tint of high relative chroma and a yellow-red tint (skin color) of substantially low relative chroma (see, for example, U.S. Pat. No. 5,378,590). However, the color reversal photographic element of this invention defines the relative chroma of a yellow-red tint (skin color) only. There is no reference to the hue of skin color.
On the other hand, a color reversal photographic light-sensitive material comprising interimage effect controlling means, wherein chroma and hue are defined with respect to “skin color” and “red-tint skin color” (see, or example, U.S. Pat. No. 6,048,673). However, this invention also provides no definition relating to a chroma ratio between skin colors different in brightness and, therefore, is not satisfactory with respect to improvement in skin color. This invention includes a description that there may be arranged an interimage effect imparting layer having a spectral sensitivity distribution different than that of a main blue-, green- and red-sensitive layers. However, it does not disclose any specific approach. Moreover, there is no description to teach the usefulness of the two kinds of interimage effect imparting layers.
BRIEF SUMMARY OF THE INVENTION
An object of the present invention is to provide a silver halide color reversal photographic light-sensitive material having an improved color reproduction and particularly to provide a color reversal photographic light-sensitive material which is superior in skin color reproduction and in faithful color reproduction and which shows a slight change with respect to light and shade of an object and to variation in exposure. Moreover, another object of the present invention is to provide a color reversal photographic light-sensitive material improved in adaptability for various light sources and in color temperature dependency of light source.
The objects of the invention have been attained by the following approaches.
(1) A silver halide color reversal photographic light-sensitive material having on a transparent support at least one blue-sensitive silver halide emulsion layer containing a yellow-coloring coupler, at least one green-sensitive silver halide emulsion layer containing a magenta-coloring coupler and at least one red-sensitive silver halide emulsion layer containing a cyan-coloring coupler, wherein the photographic light-sensitive material comprising at least one interimage effect imparting layer (a) defined below and at least one interimage effect imparting layer (b) defined below in addition to the blue-, green- and red-sensitive silver halide emulsion layers, wherein, when the photographic light-sensitive material is exposed to light of a “skin color” having the spectral distribution of Table 1 and is then subjected to development, a ratio of the chroma C*
70
at a brightness L*=70 represented by CIE Lab color system to the chroma C*
50
at a brightness L*=50, C*
70
/C*
50
, is 0.7 or more.
(a) an interimage effect imparting layer containing a short-wavelength green-sensitive silver halide emulsion having a weight-averaged wavelength of a spectral sensitivity distribution in the range of 500 nm to 560 nm;
(b) an interimage effect imparting layer containing a red-sensitive silver halide emulsion having a weight-averaged wavelength of a spectral sensitivity distribution in the range of 580 nm to 700 nm.
TABLE 1
Spectral reflectance distribution of skin color
Wave-
Spectral
length
reflectance of
(nm)
skin color
400
0.1687
405
0.1621
410
0.1611
415
0.1577
420
0.1560
425
0.1570
430
0.1605
435
0.1675
440
0.1809
445
0.1937
450
0.2044
455
0.2105
460
0.2184
465
0.2223
470
0.2279
475
0.2337
480
0.2397
485
0.2439
490
0.2490
495
0.2546
500
0.2625
505
0.2685
510
0.2802
515
0.2853
520
0.2893
525
0.2931
530
0.2932
535
0.2967
540
0.2993
545
0.2994
550
0.2999
555
0.3022
560
0.3041
565
0.3056
570
0.3103
575
0.3095
580
0.3136
585
0.3272
590
0.3450
595
0.3630
600
0.3841
605
0.3970
610
0.4106
615
0.4187
620
0.4273
625
0.4398
630
0.4458
635
0.4548
640
0.4615
645
0.4755
650
0.4796
655
0.4858
660
0.4913
665
0.4988
670
0.5041
675
0.5034
680
0.4991
685
0.5043
690
0.5072
695
0.5163
700
0.5189
(2) The silver halide color reversal photographic light-sensitive material described in item (1) above, wherein a ratio of the chroma C*
20
at a brightness L*=20 to the chroma C*
50
at a brightness L*=50, C*
20
/C*
50
, is 0.7 or more.
(3) The silver halide color reversal photographic light-sensitive material described in items (1) or (2) above, wherein the standard deviation of the hue angle in the CIE Lab color system of a “skin color” image that is reproduced by the photographic light-sensitive material is within 1.0 in the range of brightness L*=20 to 70.
(4) The silver halide color reversal photographic light-sensitive material described in any one of items (1) to (3) above, wherein when the photographic light-sensitive material is exposed to light having a “gray” spectral reflectance distribution shown in Table 2 and is then subjected to development, the chroma C* value represented in the CIE Lab color system of a “gray” image that is reproduced by the photographic light-sensitive material, is 0 or more, but 10 or less, in the range of L*=20 to 70.
TABLE 2
Spectral reflectance distribution of gray
Wave-
Spectral
length
reflectance of
(nm)
gray
400
0.1719
405
0.1824
410
0.1868
415
0.1887
420
0.1896
425
0.1906
430
0.1914
435
0.1927
440
0.1937
445
0.1948
450
0.1949
455
0.1948
460
0.1948
465
0.1943
470
0.1944
475
0.1943
480
0.1940
485
0.1938
490
0.1940
495
0.1941
500
0.1946
505
0.1947
510
0.1949
515
0.1950
520
0.1954
525
0.1958
530
0.1959
535
0.1961
540
0.1964
545
0.1965
550
0.1964
555
0.1966
560
0.1967
565
0.1970
570
0.1973
575
0.1977
580
0.1982
585
0.1984
590
0.1983
595
0.1983
600
0.1979
605
0.1974
61
Kakinuma Akihiro
Maeno Yutaka
Shuto Sadanobu
Fuji Photo Film Co. , Ltd.
Letscher Geraldine
Sughrue & Mion, PLLC
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