摘要:
A method for manufacturing a silver halide emulsion comprising the steps of forming silver halide grains in the presence of a hydrophilic colloid, physical ripening, desalting, and chemical ripening, wherein a photographic spectral sensitizing dye is added to the emulsion after adding at least 85% by weight of a soluble silver salt solution but before the desalting step is described.
摘要:
A silver halide color photographic material comprising a support having thereon at least one silver halide photographic emulsion layer and at least one layer containing colloidal silver, wherein said colloidal silver-containing layer comprises at least one compound selected from compounds of general formula (I) and (II) below, and at least one photosensitive or non-photosensitive layer selected from a silver halide photosensitive layer positioned farthest from said support and any layers positioned between said farthest photosensitive layer and said support comprises a silver halide emulsion containing internally-fogged or surface-fogged silver halide grains: ##STR1## wherein the substituent groups on general formula (I) and (II) are as defined in the specification.
摘要:
A novel direct positive photosensitive material is provided comprising a support having therein at least one photographic emulsion layer containing internal latent image type silver halide grains not having been previously fogged, wherein the photographic emulsion layer comprises:(1) at least one of compounds represented by the general formulae [I], [II] and [III]; and(2) at least one of compounds represented by the general formulae [IV], [V] and [VI]:R--SO.sub.2 S--M [I]R--SO.sub.2 S--R.sup.1 [II]R--SO.sub.2 S--Lm--S.O.sub.2 S--R.sup.2 [III]wherein R, R.sup.1 and R.sup.2 may be the same or different and each represents an aliphatic group, aromatic group or heterocyclic group; M represents a cation; L represents a divalent connecting group; and m represents an integer 0 or 1;M'.sub.2 SO.sub.3 [IV]M'HSO.sub.3 [V]M'.sub.2 S.sub.2 O.sub.5 [VI]wherein M' represents a hydrogen atom or cation.
摘要:
A direct positive photosensitive material composed of a support having thereon at least one photosensitive emulsion layer comprising non-prefogged internal latent image silver halide grains and at least one compound represented by formulae (I), (II), (III) or (IV): ##STR1## wherein M.sub.1 represents hydrogen, a cation or a protective group capable of being cleaved by an alkali; and Z represents an atomic group necessary for forming a 5-membered or 6-membered substituted or unsubstituted ring selected from a heterocyclic ring and a condensed heterocyclic ring; ##STR2## wherein Z.sub.1 represents an alkyl group containing from 1 to 18 carbon atoms, an aryl group containing from 6 to 18 carbon atoms or a heterocyclic group; Y.sub.1 and Y.sub.2, which may be the same or different, each represents an atomic group necessary for forming an aromatic ring containing from 6 to 18 carbon atoms or a heterocyclic ring; M represents a metal atom or an organic cation; and n is an integer of 2 to 10.
摘要:
A silver halide color reversal light-sensitive material comprising a support having thereon at least one red-sensitive emulsion layer, at least one green-sensitive emulsion layer and at least one blue-sensitive emulsion layer, at least one layer of said light-sensitive material comprising (1) an emulsion containing tabular silver halide grains having a diameter/thickness ratio of at least of about 4 and (2) at least one compound represented by the following general formulae (I) to (IV), said tabular silver halide grains being present in amount of at least about 50% of the total projected area of silver halide grains present in the same layer: ##STR1## wherein M.sub.1 represents a hydrogen atom, a cation or a group cleavable in alkaline conditions, and Z represents an atomic group as defined in the specification; ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents an alkyl group, an aryl group or an aralkyl group as defined in the specification, X.sup..crclbar. represents an anion, and n is 1 or is 0 when the compound forms an inner salt; ##STR3## wherein R.sub.5 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, V represents O, S, Se or NR.sub.6 wherein R.sub.6 represents an alkyl group, an aralkyl group, an alkenyl group, an aryl group or a heterocyclic group, which may be the same or different from R.sub.5, and Q.sub.1 represents an atomic group as defined in the specification; and ##STR4## wherein Y and Z, which may be the same or different, each represents a methine group, a substituted methine group or a nitrogen atom, Q.sub.2 represents an atomic group as defined in the specification, and M.sub.2 represents a hydrogen atom or a cation selected from an alkali metal cation and an ammonium ion.
摘要:
In a silver halide color photographic light-sensitive material which includes at least one layer of each of red-, green-, and blue-sensitive silver halide emulsion layers and a yellow filter layer containing yellow colloidal silver on a support, an average grain size of at least one of the light-sensitive silver halide emulsions is 0.4 .mu.m or less, a maximum absorption peak of yellow colloidal silver in the yellow filter layer appears at 430 to 450 nm, and 1/4 absorption of the maximum absorption at the longer wavelength side occurs within the range of 500 to 560 nm. This photographic light-sensitive material can reduce a fog by the yellow filter layer without degrading other photographic properties.
摘要:
A silver halide color reversal photographic material is disclosed which comprises a support and at least one blue-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer and at least one red-sensitive silver halide emulsion layer on the support, which material is characterized in that at least one light-sensitive silver halide emulsion layer or at least one layer adjacent thereto contains at least one of the compounds represented by the following general formulae (I), (II), (III) and (IV): ##STR1## All the symbols used are as defined in the Specification.
摘要:
A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer containing tabular silver halide grains which have a diameter not less than 5 times the thickness thereof and account for at least 50% of the total projected area of the silver halide grains present in the silver halide emulsion layer and the silver halide photographic material also contains at least one compound represented by following general formulae (I), (II), (III) and (IV): ##STR1## wherein R represents a straight chain, branched chain or cyclic alkylene group, a straight chain or branched chain alkenylene group, a straight chain or branched chain aralkylene group or an arylene group; R.sub.1 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group; Z represents a hydrogen atom or a polar substituent; X represents a hydrogen atom, a cation necessary for neutralizing the molecule or a precursor; and n represents 0 or 1.The silver halide photographic material has improved image sharpness not only at high spatial frequencies but also at low spatial frequencies.
摘要:
The present invention relates to a silver halide color reversal photographic material comprising photosensitive silver halide photographic layers in which the average silver chloride content of the photosensitive silver halide emulsions is less than 7.0 mol %, at least one emulsion layer of the photographic layers consists of two or more emulsions having different average grain diameters, and the emulsion layer and/or the adjacent intermediate layer contains at least one compound that can release a photographically useful agent by redox reaction with the oxidation product of a developing agent. The silver halide color reversal photographic material of the present invention has a color-reversed image improved in graininess and sensitivity.
摘要:
A direct positive image forming method comprising development processing an imagewise exposed photographic light-sensitive material comprising a support having thereon at least on photographic emulsion layer containing internal latent image type silver halide grains not having been previously fogged in the presence of a nucleating agent, wherein the nucleating agent comprises at least two kinds of nucleating agents and a ratio of nucleating rates thereof is at least 2.0.In accordance with the method of the present invention, images having both a low minimum density and an extremely high maximum density can be rapidly and stably obtained using a small amount of nucleating agents.