Abstract: A method is provided for forming in a semiconductive conjugated polymer at least first and second regions having different optical properties. The method comprises: forming a layer of a precursor polymer and permitting the first region to come into contact with a reactant, such as an acid, and heat while permitting the second region to come into contact with a lower concentration of the reactant. The reactant affects the conversion conditions of the precursor polymer in such a way as to control the optical properties of at least the first region so that the optical properties of the first region are different from those of the second region.The precursor polymer may comprise a poly(arylene-1,2-ethanediyl) polymer, at least some of the ethane groups of which include a modifier group whose susceptibility to elimination is increased in the presence of the reactant.

Abstract: Monocyclic and polycyclic azoles having the following formula modify the tone of a silver image formed from a fine grain radiation sensitive silver chlorobromide emulsion layer in which the silver chlorobromide grains have a mean equivalent circular diameter of less than 0.3 .mu.m. The azoles have the formula: ##STR1## wherein Z is --N.dbd. or --C(R.sup.5).dbd. where R.sup.5 is hydrogen, --NH.sub.2, aliphatic of 1 to 8 carbon atoms or aromatic of 1 to 8 carbon atoms;R.sup.4 is hydrogen, aliphatic of 1 to 8 carbon atoms or aromatic of 1 to 8 carbon atoms;R.sup.4 and R.sup.5 together complete a 5 or 6 membered heterocyclic nucleus containing 1 to 3 ring nitrogen atoms;L is a divalent aliphatic linking group containing 1 to 8 carbon atoms;T is an aliphatic terminal group containing 1 to 8 carbon atoms;m is 0 or 1;n is an integer of 1 to 4; andp is an integer of 2 to 4.

Abstract: A silver halide photographic light-sensitive material for development in a development solution at a pH of at least 11.4 is disclosed. The material comprises a support having a silver halide emulsion layer comprising a compound capable of releasing a development inhibitor having a decomposition half-life in the range of above 4 to 225 hours at pH 10, said inhibitor after decomposition having substantially no photographic inhibitor properties, the compound having the formula:CAR--(TIME).sub.n --INH--L--Y (I).

Abstract: There are described a method for retouching photographic images, compositions adapted for such retouching, and photographic elements containing dye-forming couplers that yield dye images that particularly lend themselves to retouching by this method. The method comprises contacting a photographic element containing a dye image with a defined retouching composition to solubilize and remove selected areas or amounts of dye. The composition comprises an aqueous basic solution of a dinucleophile and a water-soluble organic co-solvent. The preferred photographic element for application of this retouching method comprises a dye image formed from a pyrazoloazole magenta dye forming coupler having a cleavable ballast group joined to the remainder of the molecule by one or two electrophilic cleavage groups. The retouching composition cleaves the ballast from the dye and solubilizes the dye, allowing it to be washed from the element.

Abstract: Monocyclic and polycyclic azoles having the following formula modify the tone of a silver image formed from a fine grain radiation sensitive silver bromide or silver bromoiodide emulsion layer in which the silver bromide or silver bromoiodide grains have a mean equivalent circular diameter of less than 0.3 .mu.m. The azoles have the formula: ##STR1## wherein Z is --N.dbd. or --C(R.sup.5).dbd. where R.sup.5 is hydrogen, --NH.sub.2, aliphatic of 1 to 8 carbon atoms or aromatic of 1 to 8 carbon atoms;R.sup.4 is hydrogen, aliphatic of 1 to 8 carbon atoms or aromatic of 1 to 8 carbon atoms;R.sup.4 and R.sup.5 together complete a 5 or 6 membered heterocyclic nucleus containing 1 to 3 ring nitrogen atoms;L is a divalent aliphatic linking group containing 1 to 8 carbon atoms;T is an aliphatic terminal group containing 1 to 10 carbon atoms;m is 0 or 1;n is an integer of 1 to 4; andp is an integer of 2 to 4.

Abstract: Monocyclic and polycyclic azoles having the following formula enhance the covering power of a developed silver image formed from a radiographic element comprising a radiation sensitive tabular grain silver bromide, silver bromochloride or silver bromoiodide emulsion layer containing grains having a mean equivalent circular diameter of at least 0.3 .mu.m and a grain population wherein at least 50 percent of the total grain population projected area is accounted for by tabular grains having a tabularity of greater than 8, as determined by the relationship: ##EQU1## wherein T is tabularity; ECD is the mean effective circular diameter in .mu.m of the tabular grains; and t is the mean thickness in .mu.m of the tabular grains. The azoles have the formula: ##STR1## wherein Z is --N.dbd. or --C(R.sup.5).dbd. where R.sup.5 is hydrogen, --NH.sup.2, aliphatic of 1 to 8 carbon atoms or aromatic of 1 to 8 carbon atoms;R.sup.4 is hydrogen, aliphatic of 1 to 8 carbon atoms or aromatic of 1 to 8 carbon atoms;R.sup.4 and R.

Abstract: A photographic coupler (A) capable, upon oxidative coupling, of forming a dye that can be washed out of a photographic element containing the coupler upon processing, comprises, in the coupling position, a coupling-off group that comprises, in sequence, a releasable ballasted carbamate timing group and a releasable benzotriazole, triazole or tetrazole development inhibitor group. Such a coupler is useful in photographic silver halide materials and processes to provide improved images.

Abstract: A method of retouching a dye image comprises selective removal with an aqueous acidic organic solvent solution, as described in the application, of a portion of a dye image from an exposed and processed photographic silver halide element comprising a support bearing a dye image from a dye-forming coupler and a primary amine photographic color developing agent, wherein the dye-forming coupler: (a) contains so ionizable group that is retained as part of a dye formed upon oxidative coupling, (b) has a structure such that the Log P of the coupler is greater than 4 and is derived from a four-equivalent coupler that has a Log P less than 8, and (c) has a coupling reactivity that enables formation of maximum image density of at least 0.6. The method comprises the step of contacting the dye image with an aqueous acidic organic solvent solution, as described in the application, for a time and at a temperature sufficient to selectively dissolve and remove a portion of the dye image from the photographic element.

Abstract: A pyrazolotriazole dye-forming coupler containing on a carbon atom in a non-coupling position a ballast group derived from and bonded through a carboxylic acid portion of an unsubstituted or substituted amino acid provides useful magenta dye images in a photographic material and process and enables simplification of manufacture of the coupler. Such couplers are useful in photographic silver halide materials and processes.

Abstract: A photographic yellow dye-forming coupler is represented by the formula: ##STR1## wherein: R.sup.1 is alkyl of 1 to 4 carbon atoms;ball is a ballast group of such size and configuration as to render the coupler nondiffusible in a photographic element;Y is CO, PO.sub.3 or SO.sub.2 ;X is an aryloxy coupling-off group; andn is 1 or, when Y is PO.sub.3, n is 2.Such a coupler is useful in a color photographic silver halide element and process to provide improved activity.

Abstract: A photographic recording material is disclosed which contains a compound capable of releasing a development inhibitor moiety during photographic processing which enhances development inhibition and reduces interlayer interimage effects without adversely affecting photographic properties.

Abstract: A method of retouching a dye image comprises selective removal with an aqueous acidic organic solvent solution, as described in the application, of a portion of a dye image from an exposed and processed photographic silver halide element comprising a support bearing a dye image from a dye-forming coupler and a primary amine photographic color developing agent, wherein the dye-forming coupler: (a) contains no ionizable group that is retained as part of a dye formed upon oxidative coupling, (b) has a structure such that the Log P of the coupler is greater than 4 and is derived from a four-equivalent coupler that has a Log P less than 8, and (c) has a coupling reactivity that enables formation of maximum image density of at least 0.6. The method comprises the step of contacting the dye image with an aqueous acidic organic solvent solution, as described in the application, for a time and at a temperature sufficient to selectively dissolve and remove a portion of the dye image from the photographic element.

Abstract: Photographic compounds capable of releasing a photographically useful group are more effective in photographic materials when the photographic compounds comprise at least two differing timing groups in sequence between a carrier moiety and the photographically useful group. The two timing groups in sequence enable improved timing and control of release of the photographically useful group.

Abstract: An air driven filtration system is disclosed. The system includes a power module housing, an air driven motor and a removable filter pack. The power module is adapted to receive an intake adapter for connecting a remote filter pack thereto which may be placed in a contaminated work area. The remote filter pack is connected to the power module by flexible ducting.