摘要:
A silver halide emulsion is disclosed, comprising tabular grains having dislocation lines in the fringe portion, the tabular grains comprising a silver halide phase (V3) having a maximum iodide content, a silver halide phase (V6), internal to V3, having an average iodide content of A6 mol %, and a silver halide phase (V7), external to V3, having an average iodide content of A7 mol %, and 0≦A6/A7≦1.0; and wherein the dislocation line forming region comprises a shell accounting for 10 to 50% by volume of the grain and having an average iodide content of 4 to 20 mol %; the shell comprising an outermost sub-shell accounting for to 15% by volume of the grain and having an average iodide content of 0 to 3 mol %.
摘要:
A silver halide emulsion containing a dispersion medium and silver halide grains, wherein the silver halide grains have a variation coefficient of projected area diameters of 30% or less and 50% or more of the total projected area of the silver halide grains is occupied by silver halide grains satisfying the following requirements (a), (b), (c) and (d): (a) a hexagonal tabular silver halide grain having a smooth (111) face as a principal plane; (b) the silver iodide content is 7 mol % or more; (c) the projected area diameter is 3 nullm or more; and (d) the aspect ratio is 8 or more.
摘要:
A method has been described for processing an exposed black-and-white silver halide photographic film material comprising in a hydrophilic light-sensitive layer thereof a binder and silver halide grains being {111} or {100} tabular silver bromo(chloro)iodide or silver chloro(bromo)iodide grains having an average aspect ratio of from 1.2 to 50 and having a silver iodide content of less than 3 mole % based on silver with at least part of it at their grain surface, said method comprising the steps of developing in a developer, fixing in a fixer, rinsing and drying, characterized in that in said developing step the developer comprises an alkali soluble agent having preventing silver dissolution properties, being a mercapto azole compound as presented herein.
摘要:
A diffusion transfer photographic product is disclosed, comprising a photosensitive element, an image receiving element and a container having a processing composition, wherein the photosensitive element comprises a support having thereon at least a silver halide emulsion layer containing a silver halide emulsion comprising silver halide grains and at least 50% of total grain projected area is accounted for by silver halide regular crystal grains containing 5 mol % or less chloride and 0.5 mol % or more iodide and exhibiting a proportion of a (100) face per grain of not less than 50%, a variation coefficient of the proportion of a (100) face among grains being not more than 20%.
摘要:
A direct radiographic film is usefull for dental care. The film contains lower than normal amounts of silver 30-45 mg/dm2) and gelatino-vehicle 15-30 mg/dm2) in each silver halide emulsion unit but retains the ability to provide desired sensitometric results. The film comprises predominantly non-spectrally sensitized silver bromide tabular grains.
摘要:
A silver halide emulsion is disclosed, comprising tabular grains having an aspect ratio of 5 or more, the tabular grains further having dislocation lines of 30 or more per a grain, in a fringe portion of the grain and the tabular grains each containing silver iodide, the content of which gradually and continuously varies in the direction of from the grain center to the edge.
摘要:
The present invention relates to a light-sensitive silver halide color multilayer photographic material which comprises a support base having coated thereon at least three red-sensitive emulsion layers having different sensitivity, at least three green-sensitive emulsion layers having different sensitivity, and at least two yellow-sensitive emulsion layers having different sensitivity, wherein (a) a core-shell silver halide emulsion having an average silver iodide content lower than 10% mol is present in at least one of the lowest sensitive red-, green- and yellow layers, (b) a yellow dye forming malonodiamide DIR coupler having in the coupling position thereof a 4,7-dihalogen-2-benzotriazolyl group is present in both the medium sensitive red- and green-sensitive layers, and (c) a yellow dye forming DIR coupler having a 1,2,4-triazolyl group attached to the coupling position, such 1,2,4-triazolyl group comprising a hydrolizable alkoxy- or aryloxy-carbonyl group attached to a benzytlthio substituent on the 1,2,4-triazolyl group is present in at least one of the highest sensitive red- and green-sensitive layers.
摘要:
A system for industrial radiography is disclosed comprised of (1) an industrial radiographic element comprised of a support covered on each of its major faces with a tabular grain emulsion layer in which at least 50 percent of total grain projected area is accounted for by silver bromide tabular grains having an average aspect ratio of at least 2 and a volume greater than 0.03 .mu.m.sup.3 and (2) disposed on opposite sides of the radiographic element, two intensifying screens designed to emit electrons when exposed to X or gamma rays with an energy greater than or equal to 10 kV. A speed improvement is realized upon exposure and processing.
摘要:
Photographic print elements are disclosed of enhanced speed and controlled minimum densities provided by emulsion layer units that contain emulsions that are blends of (a) cubical silver iodochloride grains that contain iodide in a controlled, non-uniform distribution forming a core containing at least half of total silver, a iodide-free surface shell having a thickness of greater than 25 .ANG., and a sub-surface shell that contains a maximum iodide concentration and (b) minimum density controlling silver halide grains that are of smaller mean grain size than the silver iodochloride grains and that consist essentially of chloride and/or bromide and are present in a molar concentration at least equal to that of silver iodide in the silver iodochloride grains.
摘要:
A method for the preparation of silver halide tabular emulsion grains, containing at least 75 % chloride, wherein at least 50 % of the total projected area of all the grains is provided by the tabular grains, and wherein the tabular grains exhibit an average aspect ratio of at least 5:1, an average thickness not greater than 0.5 micron and an average diameter of at least 0.6 micron. The method comprisespreparing a dispersion medium containing a gelatino-peptizer, and a compound ##STR1## wherein Z represents the atoms necessary to form a fused on aromatic carbocyclic or heterocyclic, unsubstituted or substituted ring, e.g., substituted with alkyl, alkenyl, aryl, alkoxy, hydroxy, mercapto, carboxy, amino or halogen, R is hydrogen or a substituent as defined for ring Z; n is 1 or 0, and Q represents carbon in which case n=1, or Q represents nitrogen, in which latter case n =0; in a concentration ranging from 10.sup.-4 to 10.sup.-2 molar. The pH of the medium is adjusted to between 5.0 and 9.0 and to a pCl between 1.0 and 2.0 by means of a chloride ions providing salt;performing a silver halide precipitation comprising at least one double jet step by introducing in the dispersion medium at least one solution containing chloride ions and at least one solution containing silver ions in such a way that pCl is maintained between 1.0 and 2.0, pH is maintained between 5.0 and 9.0 and the concentration of compound (Ia) or (Ib) is maintained between 10.sup.-4 molar and 10.sup.-2 molar; andremoving excess of soluble salts by a wash technique performed at a pH value comprised between 4.0 and 9.0.