JPH03240048A - Silver halide color photographic sensitive material - Google Patents

Abstract

PURPOSE:To obtain the material having a high print yield in a developing laboratory by incorporating a silver halide emulsion which consists mainly of twins, is monodisperse and has a high silver iodide content phase in the particles into photosensitive emulsion layers and specifying the respective color developing density function curves after exposing and developing. CONSTITUTION:The silver halide emulsion which consists mainly of the twins, is monodisperse and has the high silver iodide content phase in the particles is incorporated into >=1 layer of the emulsion layers. The exposure logEi and the density di thereof taken at every DELTAlogE=0.5 unit in the range up to long E5 existing at DELTAlogE=2.5 further from the exposure logE0 to give the density d0 of the min. density Dmin+0.15 in the respective color developing density curves D-(logE) of the yellow, magenta and cyan after the exposing and develop ing are specified to gi/h=1.00+ or -0.10 when gi=(di-ddi-1)/(logEi-logEi-1)h=(d5- D0)/(logE5-logE0). The material having the high print yield in the developing laboratory is obtd. in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a silver halide color photographic light-sensitive material. The present invention can be used, for example, as a photographic color negative photosensitive material for printing, and in this case, it can provide a silver halide photographic photosensitive material that can reduce loss during printing in a developing laboratory.

[Background of the invention]

In recent years, in the market, demand for photographic consumer goods has been growing at an extremely high level of around 10% per year. This is due to a number of factors, including the fact that product development is proceeding smoothly in line with the increasing number of photo opportunities, and the fact that we are able to provide photos with print quality that satisfies photographers. It is thought that there are points. In particular, with the active introduction of compact cameras into the market and the subsequent penetration of zoom lenses, photographers have come to expect the best quality results at any time and in any location when they want to preserve their photographs. It can be said that the opportunities to press the shutter on the subject are increasing.

In response to the expectations of photographers, photofinishing laboratories make various efforts to ship the best possible prints. However, due to the miniaturization of cameras and the spread of zoom lenses,
Since the value is large, that is, the use of a dark lens is often a prerequisite, it is often necessary to print underexposed photographs or negative color films with insufficient peripheral illumination. In addition, when disposable cameras with attached cameras, which have become rapidly popular in recent years, are used, it is necessary to print negative color film that has been shot under a wide range of exposure conditions, from underexposure to overexposure. It has also become a situation.

In photofinishing labs, various measures are taken to produce the best prints, but when we look at the statistics of the yield of the best prints, we find that for photographic negatives and photosensitive materials with an ISO sensitivity of around 100, The print yield is not that low, but the ISO sensitivity is 2.
It has been found that the printing yield is relatively low for photosensitive materials with a rating of 00 or higher.

If we analyze in more detail the above-mentioned photographic negative films with low print yields, we find that the print yields are low for those photographed using lenses of poor quality, and the characteristic is that they are cheap films with large lens aberrations. It has been found that when taking photographs using a lens, the periphery of the print is underexposed, and the image quality is particularly inconsistent from the periphery to the center.

From the various analyzes mentioned above, the above-mentioned problems cannot be solved no matter how much effort and ingenuity is made in each process of developing negative color film, exposing prints, and developing paper in photo labs. It was recognized that this problem cannot be solved unless the negative color film used is improved.

[Problems to be solved by the invention]

Claims (1)

[Scope of Claims] 1. A silver halide color photographic material having at least one red-sensitive layer, one green-sensitive layer, and one blue-sensitive layer on a support, at least one of the photosensitive layers. One layer contains a silver halide emulsion that is mainly composed of twin crystals, is monodisperse, and has a high silver iodide content phase inside the grains, and has yellow, magenta, and cyan colors after exposure and development. At least one of the concentration function curves D-(logE) has a minimum concentration Dmin+0.15 in the curve.
Δl is further than the exposure amount logE_0 that gives the density d_0 of
Exposure points logE taken every ΔlogE=0.5 units in the range up to logE_5 at ogE=2.5
_i (i=0, 1, 2, 3, 4, 5) and each logE_
Density given by i d_i (i=0, 1, 2, 3, 4, 5)
In (1) formula g_i d_i=[d_i-d_i_-_1]/[logE_i
-logE_i_-_1]...(1) and (2) formula h h=[d_5-d_0]/[logE_5-logE_
0]...A silver halide color photographic material characterized in that j_i, which represents the ratio to (2), is in the relationship expressed by formula (3). j_i=g_i/h=1.00±0.10...(3)