Abstract: A novel process is provided for processing a silver halide color photographic material with a color developing solution containing at least one aromatic primary amine color developing agent, wherein said silver halide color photographic material contains at least one of anti-bacterial agents represented by the general formulas (I), (II), (III), (IV) and (V) and that the processing is effected while said color developing solution is supplied in an amount of 20 to 120 ml per 1 m.sup.2 of said silver halide color photographic material.

Abstract: The present invention provides a method of manufacturing an optical fiber preform having the steps of disposing a rod member made of a silica-based material within a cavity of a mold, followed by loading a molding material within the mold cavity, and applying pressure to the mold from the outside to form a porous layer on the surface of the rod member and, thus, to obtain a porous preform, wherein at least one end portion of the rod member extends outside the mold cavity in the step of applying pressure to the mold. The particular method permits manufacturing a high quality porous preform free from splits or cracks, making it possible to obtain a high quality optical fiber preform free from residual bubbles.

Abstract: An apparatus for forming a porous preform that is useable to an optical fiber by extruding a plastifiable material having silica powder as a main component thereof. The apparatus includes an extruding main body having a cylinder and a screw for extruding the plastifiable material from the cylinder and a material passage member connected to the cylinder so as to communicate therewith. The material passage member has a projection member which projects into the material passage member for preventing a lamination of the plastifiable material. The apparatus also includes a molding head connected to the material passage member so as to communicate therewith.

Abstract: A method for manufacturing a preform having steps of obtaining a plastic material by kneading silica powder, a binder, water, and a surfactant, and obtaining a porous preform by extrusion-molding the plastic material.

Abstract: Disclosed is a powdery bleach-fixing composition which is substantially not caked during storage. The bleach-fixing composition for color photographic materials comprises a thiosulfate, an iron (III) complex compound or a salt thereof, and a sulfite, bisulfite or pyrosulfite, at least 50 molar % (in terms of sulfite ion equivalent) thereof being potassium salt.

Abstract: There is disclosed a method for processing a silver halide color photographic material containing a yellow coupler represented by formula (Y) with a color developer containing an aromatic primary amine color developing agent and a polymer of vinyl alcohol or vinyl pyrrolidone series. The disclosure described provides a method for development processing wherein yellow stain and processing nonuniformity in a running processing can be prevented effectively.

Abstract: In accordance with the present invention a method for continuously processing a silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent is disclosed. The silver halide color photographic material at least one of the layers of which contains a silver halide emulsion of a high chloride comprising 80 mol % or over of silver chloride is processed, after exposure to light, with the replenishing amount of the color developer being 20 to 120 ml per m.sup.2 of the silver halide photographic material. The silver halide photographic material contains at least one of pyrazoloazole magenta couplers.

Abstract: The method of manufacturing a silica glass preform comprises the steps of inserting a rod-like member mainly containing a ductile material, into a forming space of a mold, charging the remaining space of the forming space with a forming material containing silica glass powder or doped silica glass powder, compressing the mold charged with the forming material from outside such as to form a porous glass body of the forming material around the rod-like member, removing the rod-like member from the porous glass body, inserting a glass rod into the hole formed after removal of the rod-like member, purifying said porous glass body in which the glass rod is inserted, and consolidating said porous glass body purified in the above purifying step.

Abstract: A silica-based glass rod is inserted into a space portion of a mold. Then, a slurry, which is obtained by dispersing a silica glass powder material in pure water, is poured into a molding space between the glass rod and the inner surface of the mold, whereby a porous glass shaped body is formed around the glass rod. Drying this shaped body results in a silica glass base material which includes the glass rod and the porous glass shaped body surrounding the same.

Abstract: There is disclosed a method for processing a silver halide color photographic material paper base of which contains at least one of specified sizing agents with a color developer containing a hydroxylamine compound. According to the disclosure edge stain due to penetration of the color developer into the paper base is prevented.

Abstract: An extruding apparatus having at least two independent inlet ports, one outlet port communicating with the inlet ports, and at least two passages connecting the inlet ports with the outlet port, in which a section of a joint portion of the passages has a central portion and an outer peripheral portion which are concentrically arranged, is prepared. A core material is supplied to one of the passages communicating with the central portion of the joint portion from a corresponding inlet port, and a cladding material is supplied to the other passage communicating with the outer peripheral portion from a corresponding inlet port, thereby causing the two materials to join each other at the joint portion. An integral shaped body having a portion corresponding to a core at its central portion and a portion corresponding to a cladding around the central portion is extruded from the outlet port. Water and a binder and other impurities are removed from the shaped body, and the resultant body is consolidated.

Abstract: A composition for color-development of a silver halide color photographic material and a method for processing such using the same wherein the composition comprises an aromatic primary amine color developing agent, a hydroxylamine compound represented by formula (I) or a hydrazine compound represented by formula (II) and at least one polymer selected from the group consisting of a vinyl alcohol homopolymer, a vinyl alcohol copolymer, a vinylpyrrolidone homopolymer, and a vinylpyrrolidone copolymer, being free from sulfite ion, providing a color photographic image high in maximum density and good in whiteness without causing problems by tarry substance in the color developer.

Abstract: A method for processing a silver halide color photographic material comprising at least one silver halide emulsion layer, which comprises developing the silver halide color photographic material with a color developer containing at least one aromatic primary amine color developing agent, wherein the photographic material contains (a) at least one high silver chloride content emulsion layer with a silver chloride content of 80 mol % or more, and (b) a compound of formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represents --COOR.sub.5, ##STR2## --COR.sub.5 --CN or a halogenated methane R.sub.3 and R.sub.4 each represents a hydrogen atom or an unsubstituted or substituted alkyl group; R.sub.5 and R.sub.6 each represents a hydrogen atom, an unsubstituted or substituted alkyl group or an unsubstituted or substituted aryl group; Q.sub.1 and Q.sub.2 each represents an aryl group; X.sub.1 and X.sub.2 each represents a chemical bond or a divalent linking group; Y.sub.1 and Y.sub.

Abstract: A method for continuously processing an image-wise exposed silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer containing 95 mol % or more of silver chloride is disclosed, which comprises the steps of developing the silver halide color photographic material in a color developer and supplying a replenisher to the color developer, the replenisher comprising used color developer and a regenerant wherein components accumulated to the color developer during the continuous processing are not removed from the replenisher. This method does not require a large scale apparatus and provides stable photographic properties without substantially producing waste water and without causing crystallization of chemicals in a replenisher even after repeated regeneration, particularly when varying the amount of light-sensitive material being processed per unit time.

Abstract: A method for continuously processing silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent is disclosed. In the method a silver halide color photographic material at least one of the layers of which contains a silver halide emulsion of a high chloride comprising 80 mol % or over of silver chloride is processed in the presence of a specific heterocyclic compound, after exposure to light, with a color developer that is substantially free from sulfite ions and whose replenishing amount is 120 ml or below per m.sup.2 of the silver halide photographic material, to attain desired photographic characteristics.

Abstract: There is disclosed a method for processing a silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent. In the method a silver halide color photographic material which comprises a pyrazoloazole-type coupler and an image-dye stabilizer, and has at least one of the layers comprising a silver halide emulsion of a high silver chloride and the total coating amount of silver of 0.75 g/m.sup.2 or below is processed, after exposure to light, with a color developer containing a specified amount of chloride ions and bromide ions, to improve development treatment characteristics, desilvering ability, and stability of an image.

Abstract: A method for continuously processing silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent is disclosed. In the method a silver halide color photographic material at least one of the layers of which contains a silver halide emulsion of a high chloride comprising 80 mol % or over of silver chloride is processed, after exposure to light, with a color developer that is substantially free from sulfite ions and whose replenishing amount is 120 ml or below per m.sup.2 of the silver halide photographic material, to attain desired photographic characteristics.

Abstract: There is disclosed a method for processing a silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent. In the method a silver halide color photographic material having at least one of the layers of which contains a silver halide emulsion of a high chloride comprising 80 mol % or over of silver chloride and the total coating amount of silver of which is 0.75 g/m.sup.2 or below is processed, after exposure to light, with a color developer containing a specified amount of chloride ions and bromide ions. The silver halide color photographic material contains at least one of yellow couplers specified.

Abstract: A method for processing a silver halide color photosensitive material is disclosed.The method comprises developing a color photographic light-sensitive material composed of a support having thereon at least one light-sensitive silver halide emulsion layer containing a silver halide comprising at least 98 mol % silver chloride;in a color developer solution comprising a primary amine color developing agent, and having a chloride ion concentration of from 4.times.10.sup.-2 to 1.times.10.sup.-1 mol/l, and a bromide ion concentration of from 5.times.10.sup.-5 to 5.times.10.sup.-4 mol/l.When used in rapid processing methods, the method according to the invention prevents fogging streaks, and provides high maximum density and low minimum density images.

Abstract: A photographic developing apparatus of the type in which development is effected by passing exposed sensitive material (principally one for printing such as photographic paper) successively through a developing vessel, a bleaching/fixing vessel, and a rinsing vessel. The bleaching/fixing vessel is replenished with a mixture of concentrated processing liquid and liquid extracted from the rinsing vessel, so that the amount of processing liquid discharged from the rinsing vessel as overflow is reduced, thereby alleviating the burden of waste liquid disposal.