摘要:
A silver halide photographic light-sensitive material comprising a support having coated thereon at least one silver halide emulsion layer and a surface protecting layer, said silver halide photographic light-sensitive material comprising photosensitive silver halide grains and internally fogged silver halide grains, said internally fogged silver halide grains having adsorbed thereon at least one compound represented by the formula (I): ##STR1## wherein X represents --O--, --NH-- or --S--, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent hydrogen atom or a substituent, and at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is substituted or unsubstituted alkyl or aryl group having up to 13 carbon atoms, which is bonded directly or through a divalent linkage group, to the aromatic nucleus.
摘要:
A novel silver halide photographic light-sensitive material having at least one silver halide photographic emulsion layer coated on at least one side of a support, wherein said photographic emulsion layer comprises a light-sensitive silver halide emulsion and said photographic emulsion or other layer(s) comprises a substantially light-insensitive, unfogged silver halide fine grain emulsion, with a heterocyclic mercapto compound represented by the following general formula (I) being adsorbed on the fine grains in said emulsion: general formula (I) ##STR1## wherein X represents --O--, --NH--, or --S--; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are a hydrogen atom or a substituent group; at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a substituted or unsubstituted alkyl or aryl group having up to 13 carbon atoms, such alkyl or aryl being bonded directly or through a divalent linkage group to the aromatic nucleus; X.sub.1 represents a hydrogen atom or a cation, such cation being required to neutralize the molecule.The silver halide photographic light-sensitive material is a high-speed material which exhibits improved granularity, gradation and rate of development.
摘要:
This invention provides a silver halide photographic light sensitive material having an improved blackness of image silver, as well as high sensitivity and covering power. The present silver halide photographic light sensitive material includes at least one layer of a silver halide photographic emulsion on at least one side of a support, characterized in that said layer of silver halide photographic emulsion contains fine silver halide grains, or tabular silver halide grains having a grain thickness of 0.4.mu. or less, and a dye having a maximum absorption wave length of 520 to 580 nm is contained in said layer of silver halide photographic emulsion and/or another layer such that the transmission density of green light is 0.03 or less after the developing treatment of the photographic light sensitive material.
摘要:
The present invention relates to a silver halide emulsion containing a thiocyanate and having a high sensitivity in particular to light of a low illuminance. According to the present invention, a silver halide emulsion is provided, wherein the IR absorbance at 2052 cm.sup.-1 due to thiocyanate ion contained in the silver halide grain of the emulsion is observed and a tricarboxylic acid or its salt is contained in the emulsion.
摘要:
A novel silver halide photographic light-sensitive material comprising a support having coated thereon at least one silver halide emulsion layer, said silver halide photographic light-sensitive material comprising photosensitive silver halide grains and internally fogged silver halide grains, said internally fogged silver halide grains having contained therein at least one compound such as ##STR1## The silver halide photographic light-sensitive material is a high-speed one which gives an image having high contrast and high maximum density.
摘要:
A method of developing silver halide photographic material which contains a light-sensitive silver halide emulsion and an internally-fogged silver halide emulsion, in which the internally-fogged emulsion has internal fogging nuclei at a depth of 0.02.mu. or more below the surface of the grains is disclosed. The photographic material is developed in the presence of at least one compound selected from the group consisting of tetraazaindenes containing at least one mercapto group, purines containing at least one mercapto group, triazaindenes containing at least one mercapto group and pentaazaindenes containing at least one mercapto group, to increase photographic speed, contrast and maximum density as well as remove uneven stain.
摘要:
A silver halide photographic material which contains a light-sensitive silver halide emulsion and an internally fogged silver halide emulsion is development-processed in the presence of at least one compound selected from the group consisting of compounds represented by the general formulae (I) and (II) and at least one azaindene having a mercapto group to exhibit high photographic speed, high contrast and high maximum image density:R.sub.1 --(R.sub.3).sub.l X}.sub.n R.sub.3 '--R.sub.2 (I)wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an aryl group, an aryl group, or a heterocyclic group; R.sub.3 and R.sub.3 ' each represents an alkylene group, an arylene group, a heterocyclic group; X presents ##STR1## R.sub.4 represents a hydrogen atom or --R.sub.5 --Y}.sub.m R.sub.5 '--R.sub.6 ; R.sub.5 and R.sub.5 ' have the same meanings as R.sub.3 and R.sub.3 '; R.sub.6 has the same meaning as R.sub.1 and R.sub.2 ; Y represents ##STR2## R.sub.7 has the same meaning as R.sub.1 and R.sub.2 ; l represents 0 or 1, n represents an integer of 1 to 110, and m represents an integer of 0 to 10, and at least one X therein must be a sulfur atom: ##STR3## wherein Q represents atoms necessary to form a heterocyclic ring, and A represents an alkyl group, or an aryl group.
摘要:
A silver halide color photographic material comprising a support having thereon at least one red-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer and at least one blue-sensitive silver halide emulsion layer, wherein each of the green-sensitive silver halide emulsion layer, the red-sensitive silver halide emulsion layer and the blue-sensitive silver emulsion layer contains at least one color image forming coupler, and wherein 50% or more of the total projected area of the silver halide grains in at least one of the emulsion layers comprises tabular silver halide grains having a thickness of less than 0.5 .mu.m, a diameter of 0.6 .mu.m or more and an average aspect ratio of 3 or more and the red-sensitive emulsion layer and/or the green-sensitive emulsion layer contains a dye in an amount sufficient to reduce the sensitivity thereof by 20% or more based on the sensitivity of the red-sensitive emulsion layer and/or the green-sensitive emulsion layer containing no dye, the dry film thickness from the photosensitive emulsion layer that is farthest from the support to the photosensitive emulsion layer that is nearest the support is 16.0 .mu.m or less and the swelling ratio of the silver halide color photographic material excluding the support is 1.25 or more.
摘要:
A silver halide photographic material is disclosed. The material is comprised of a support base having positioned thereon a silver halide emulsion layer and a surface protective layer. The emulsion layer contains a photosensitive silver halide emulsion, an internally fogged silver halide emulsion and a compound represented by the general formula (I):R.sub.1 [(R.sub.3).sub.l X].sub.n R.sub.3 '--R.sub.2wherein the substituents within the general formula (I) are defined within the specification. The photographic material is capable of providing an image having a high maximum density at a high speed and a high contrast. The material can be processed without requiring any specific additives in a short developing period using low-temperature processing. The material also possesses high-temperature quick processing aptitude.
摘要:
A silver halide photographic material containing a mesoionic 1,2,4-triazolium-3-thiolate compound in at least one hydrophilic colloidal layer of the silver halide photographic material gives photographic images having stable and excellent quality without being accompanied by the increased formation of fog and increased changes of sensitivity and gradation upon high temperature processing.