Abstract: Provided is a method for producing a decorative sintered metallic article and the same, used in jewelry goods, ornaments, clothing accessories, by combining a copper paste and a silver paste. The method comprises the steps of: producing a patterned piece by alternately arranging the copper paste containing an organic binder and water in 10 to 35 wt % and one or more kinds of copper powders selected from a copper powder and a copper alloy powder, and the silver paste similarly prepared to the copper paste; forming patterned pastes by drawing a pattern through deforming at least rows on the upper surface of the alternately arranged copper and silver pastes; drying the patterned pastes to produce a patterned piece; shaping a decorative object by processing the produced patterned piece; and firing the decorative object to produce a decorative sintered object.

Abstract: Are disclosed a method for producing a decorative metallic article and the decorative metallic article, used in jewelry goods, ornaments, clothing accessories or the like, the decorative metallic article being produced by joining a silver alloy composition for firing which comprises silver or a silver alloy to another composition for firing which comprises copper or a copper alloy.

Abstract: Provided are a method for producing a decorative metallic article with a wood grain metal pattern and the decorative metallic article with the wood grain metal pattern; the decorative metallic article comprising a sintered copper part produced by sintering a plastic copper containing clay compound, and a sintered silver part produced by sintering a plastic silver containing clay compound.

Abstract: A method for producing a sintered copper article for craft or decorative use made of copper or a copper alloy which can be sintered in the air by using a general heating furnace, and a plastic copper containing clay compound are provided. The method for producing the sintered copper article for craft or decorative use of the present invention comprises the steps of forming a shaped copper object using the copper containing clay compound which includes at least one kind of a powder selected from a copper powder or a copper alloy powder that contains copper in 50 wt % or more together with an organic binder, and subsequently sintering the shaped copper object, thereby to obtain a shaped copper sinter. Herein, the mean particle diameter of the powder included in the copper containing clay compound is restricted to 10 ?m or less, whereby the shaped copper sinter is obtained by sintering the shaped copper object in the air.

Abstract: Provided are a method for producing a decorative metallic article having a wood grain metal pattern and the decorative metallic article having the wood grain metal pattern; the decorative metallic article comprising a sintered copper part produced by sintering a plastic copper containing clay compound, and a sintered silver part produced by sintering a plastic silver containing clay compound.

Abstract: A clay composition for shaping noble metal is formed of a kneaded mixture of a mixed powder of noble metal having as main components thereof 30 to 70% by weight of a powder having an average particle diameter in the range of 2.2 to 3.0 ?m and 70 to 30% by weight of a powder having an average particle diameter in the range of 5 to 20 ?m with an aqueous solution of an organic binder.

Abstract: A clay composition for shaping noble metal is formed of a kneaded mixture of a mixed powder of noble metal having as main components thereof 30 to 70% by weight of a powder having an average particle diameter in the range of 2.2 to 3.0 &mgr;m and 70 to 30% by weight of a powder having an average particle diameter in the range of 5 to 20 &mgr;m with an aqueous solution of an organic binder.

Abstract: A sinter of noble metal produced by forming in a required shape or attaching to a given object a plastic art grade clayish composition or adhesion composition comprising a noble metal powder containing at least one member selected from the group consisting of pure noble metal powders and noble metal alloy powders, 0.022-3.0 wt. % of a water-soluble cellulose type resin, 0.02-3.0 wt. % of starch, or 0-0.5 wt. % of a reticular macromolecular substance formed by condensation of a component unit having phenyl propane as a backbone as an organic type binder, and water, drying to hardness the shaped composition or adhering composition, and sintering the hardened shaped composition or adhering composition at a temperature in the range of from the melting point of the noble metal and 70° C. lower than the melting point. A method for the production of the sinter of noble metal. A sinter of noble metal and an attached sinter of noble metal.

Abstract: A method for the manufacture of a precious metal product is disclosed which consists essentially of the steps of forming in a desired shape a clayish composition essentially consisting of a precious metal powder, an organic binder, and water, solidifying the formed clayish composition to obtain a solid formed mass, attaching an accessory member fast to the solid formed mass with a portion of the clayish composition serving as an adhesive agent, and firing the resultant composite having the accessory member fastened to the solid formed mass.

Abstract: A clayish composition for producing a molded article of noble metal consists essentially of a noble metal powder, starch and a water-soluble cellulose resin as organic binder and water. The contents of the starch and the water-soluble cellulose resin each fall in the range of 0.02-3.0% by weight, based on the total amount of the organic binder and the noble metal powder. A method for producing the sintered article of noble metal consists essentially of a step for producing the clayish composition mentioned above, a step of molding the clayish composition in a desired shape, a step of drying the molded article and a step of sintering the dried molded article.