Abstract: A silver halide color photosensitive material is disclosed, which has on a support at least one photosensitive silver halide emulsion layer, wherein at least one nondiffusible compound represented by the following formula (I) is contained to inhibit generation of color stain and color fog and to ensure excellent keeping quality: ##STR1## wherein R.sup.1 represents an aryl group or a heterocyclic group, R.sup.2 represents an alkyl group, a cycloalkyl group, an alkoxy group or an aryloxy group, R.sup.3 represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group and X represents an oxygen atom or a sulfur atom; provided that R.sup.3 does not represent a phenyl group when R.sup.2 represents a phenoxy group. ##STR2## wherein R'.sup.1 represents an aryl group or a heterocyclic group; A'.sup.1 and A'.sup.2 each represents a hydrogen atom or a hydrolyzable group; X represents an oxygen atom or a sulfur atom; and Y.sup.1 represents atoms completing a phosphorus-containing heterocyclic ring.

Abstract: A method and apparatus for processing sludge, which utilizes filter plates and flow regulating means to form condensed sludge of higher concentration, have been developed. The filter plates are disposed within a sludge tank and noncondensed sludge is added to the sludge tank to completely cover the filter plates. Filtrate is then removed from the sludge tank by the filtrate extraction means via the permeable walls of the filter plates. As the filtrate passes through the permeable walls a first condensed sludge forms on the filter plates. After first condensed sludge is formed on the filter plates, a flow regulating means is operated to form second condensed sludge, an even higher concentrations of condensed sludge.

Abstract: The crack-resistant compound sleeve roll having a shell portion made of a sintered alloy and a core portion made of steel is produced by (a) charging an alloy powder consisting essentially, by weight, of 1.0-3.5% of C, 2% or less of Si, 2% or less of Mn, 10% or less of Cr, 3.0-15.0% of W, 2.0-10.0% of Mo and 1.0-15.0% of V, the balance being substantially Fe and inevitable impurities, into a metal capsule disposed around a roll core; (b) after evacuation and sealing, subjecting the alloy powder to a HIP (hot isostatic pressing) treatment at 1100.degree.-1300.degree. C. to form a shell portion; (c) after removing the metal capsule, subjecting the sintered shell portion to a heat treatment having hardening at 1140.degree.-1220.degree. C. and annealing at 540.degree.-620.degree. C.; and (d) chamfering edge portions of the roll on both axial ends thereof such that a boundary of the shell portion and the core portion exists in a chamfered surface.

Abstract: A silver halide color photographic light-sensitive material includes red-, green- and blue-sensitive silver halide emulsion layers, and a non-light-sensitive layer, and contains a dye of the following formula (I). The emulsion layer or the non-light-sensitive layer contains a yellow coupler of the following formula (1) or (2), or an acylacetamide type yellow coupler having an acyl group of the following formula (Y): ##STR1## where X and Y represent an electron attractive group, or when coupled with each other, XY represents an acidic nucleus, Ar represents a phenyl group or a heterocyclic group, and L.sup.1, L.sup.2 and L.sup.3 represent a methine group, ##STR2## where X.sub.1 and X.sub.2 represent an alkyl group, an aryl group, or a heterocyclic group, X.sub.3 represents an organic group which forms a nitrogen-containing heterocyclic group together with >N--, Y represents an aryl group or a heterocyclic group, and Z represents a split-off group, ##STR3## where D.sup.

Abstract: There is disclosed a silver halide color photographic light-sensitive material capable of providing a color image which does not discolor for a long period of time and having a high preservation property. The light-sensitive material contains a novel anti-fading agent represented by following Formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, or an aliphatic oxy group; R.sub.2 and R.sub.3 may be the same or different and each represent an aliphatic group, an aromatic group, and a heterocyclic group; R.sub.4 represents a substituent; R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 each represent a hydrogen atom and a substituent; R.sub.2 and R.sub.3, R.sub.3 and R.sub.4, and R.sub.4 and R.sub.2 may be combined with each other to form a 5- to 8-membered ring, and a dimer or other polymer may be formed with R.sub.1, R.sub.2, R.sub.3 and R.sub.4 ; R.sub.5 and R.sub.6, R.sub.6 and R.sub.7, R.sub.7 and R.sub.8, and R.sub.8 and R.sub.

Abstract: A silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, at least one layer of the material containing the combination of a water-insoluble homopolymer or copolymer which has an amido bond in the repeating unit and at least one compound represented by formula (I): ##STR1## wherein X represents an alkyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an amido group or a sulfonamido group; R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an amido group, a sulfonamido group, hydrogen, a halogen atom, a sulfo group, a carboxyl group, a carbamoyl group, a sulfamoyl group, an acyl group or a sulfonyl group, provided that R.sup.1 and R.sup.2 may be linked to form a carbocyclic ring; and Y represents a hydroxyl group or a sulfonamido group.

Abstract: A novel silver halide color photographic material is provided which comprises at least one colored coupler represented by the general formula (I) and at least one cyan coupler represented by the general formula (II), (III), (IV) or (V): ##STR1## wherein R.sub.1 represents an aromatic or heterocyclic group; R.sub.2 represents a group capable of being substituted on a naphthol ring; R.sub.3 represents an aliphatic, heterocyclic or aromatic group; R.sub.4 represents an aromatic group excluding p-cyanophenyl group; R.sub.5 represents an aromatic or heterocyclic group; R.sub.6 represents an aliphatic group; n represents an integer of 0 to 4; m represents an integer of 0 to 3; A--B--N.dbd.

Abstract: A silver halide color photographic material is described, which comprises a support having provided therein at least a blue-sensitive emulsion layer, a green-sensitive emulsion layer and a red-sensitive emulsion layer, with the blue-sensitive emulsion layer comprising at least two layers differing in sensitivity, one of which is the highest sensitive emulsion layer containing at least one yellow-dye-forming coupler represented by the general formula (I), and the other of which is the lowest sensitive emulsion layer containing at least one yellow-dye-forming coupler represented by the general formula (II), whereby a yellow dye image having high maximum density and excellent in sharpness, graininess and light fastness can be produced: ##STR1##

Abstract: A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide color photographic material contains at least one yellow dye-forming coupler represented by the formula (I) ##STR1## wherein R.sub.1 represents a substituted or unsubstituted tertiary alkyl group or a substituted or unsubstituted aryl group; R.sub.2 represents a chlorine atom or an alkoxy group; R.sub.3 represents a straight chain or branched chain alkyl group having from 8 to 26 carbon atoms; R.sub.4 represents a branched alkyl group having from 3 to 12 carbon atoms; and R.sub.5 represents a hydrogen atom or a halogen atom.