Abstract: To fabricate an external timepiece element in which there is inserted at least one decoration, the decoration is formed of anterior and posterior parts respectively intended to emerge from the external element and to serve as a mechanism of anchoring the decoration in the external element. A master mold is provided, the master mold including a hollow pattern cavity matching dimensions of the anterior part of the decoration. The decoration is placed in the pattern cavity. The master mold is filled by the galvanic deposition of a metal. The external element obtained is removed from the master mold.

Abstract: Disclosed is a method of duplicating a nano-pattern texture of the surface of an object through electroforming using an imprint mold, including selecting the object having the surface texture to be duplicated; disposing the selected object and pre-treating the surface thereof; nano-imprinting the surface of the pretreated object, thus duplicating it on a plastic mold; metallizing the surface of the plastic mold through vapor deposition, and performing electroforming, thus manufacturing metal module master molds; trimming the edges of the metal module master molds, performing micro-processing, connecting the metal module master molds, and then performing electroforming, thus manufacturing a large-area metal unit master mold; and electroforming the metal unit master mold, thus producing a duplicate having the surface texture, thus exhibiting an effect in which the skin of a selected natural object can be duplicated on metal having a uniform thickness.

Abstract: The method of fabricating metal microstructures includes the following steps: a) taking a substrate that has a conductive strike surface; b) to d) forming a first resin mould by UV photolithography, the apertures in the first resin mould revealing the conductive strike surface of the substrate; e) electroforming the first element by galvanic deposition of a first metal material in the apertures of the first resin mould, f) removing the first mould around the first element to expose the conductive strike surface of the substrate; g) to i) forming a new resin mould by UV photolithography, the apertures in the new resin mould revealing the first element, and the conductive strike surface of the substrate; j) electroforming the second element by galvanic deposition of a second metal material in the apertures of the new resin mould to form said metal microstructure; k) separating said metal microstructure from the substrate and from said new mould.

Abstract: The present invention relates to an aluminum wheel having high gloss and a method for manufacturing the same, and the method for manufacturing an aluminum wheel having high gloss includes the steps of: (i) coating a primary coating powder paints for increasing a flatness of an aluminum wheel having a rough surface and improving an adhesive force to a silver mirror coating surface, (ii) forming of silver coating layer forming a mirror surface having a high gloss and high reflectivity on the powder paints coated surface using a silver coating solution, and (iii) forming at least one transparent top coating for protecting the silver mirror surface and increasing an abrasion resistance and a saltwater resistance after the step (ii). In accordance with the present in an aluminum wheel having high gloss and high reflectivity can be manufactured in a simple processes and relative inexpensive cost.

Abstract: Disclosed is a method of duplicating a nano-pattern texture of the surface of an object through electroforming using an imprint mold, including selecting the object having the surface texture to be duplicated; disposing the selected object and pre-treating the surface thereof; nano-imprinting the surface of the pretreated object, thus duplicating it on a plastic mold; metallizing the surface of the plastic mold through vapor deposition, and performing electroforming, thus manufacturing metal module master molds; trimming the edges of the metal module master molds, performing micro-processing, connecting the metal module master molds, and then performing electroforming, thus manufacturing a large-area metal unit master mold; and electroforming the metal unit master mold, thus producing a duplicate having the surface texture, thus exhibiting an effect in which the skin of a selected natural object can be duplicated on metal having a uniform thickness.

Abstract: A processing technique of electroforming for hard pure gold accessories, including carving waxwork, making silica molding, grafting wax, trimming wax, oiling, electroforming, wax removing and quality inspection, characterized in that LJJAS compounding agent was added to the electrolytic solution, the electroforming temperature is between 50 to 60 degrees, the electroforming speed is 0.05 g/h and pH value of electrolytic solution is between 7.0 to 7.5. Thus, even distribution, strong covering capacity, thin coating, short molding time, big size, lighy weight and high hardness can be achieved. This processing technique is particularly suitable to the gold processing industry.

Abstract: A method of providing a decorative metal pattern on an electrically non-conductive substrate, such as a glass or plastic substrate, which includes applying a mixture of heat fusible material, such as glass or plastic, with a metal having a particle size less than about 500 mesh constituting at least 50% of the mixture, to the substrate in the desired pattern, heating the so-applied mixture until the heat fusible material fuses and bonds to the substrate, cleaning the substrate with the pattern thereon, and a electroplating the pattern with the desired finish metal. In one method in which the mixture includes glass, a negative resist is adhesively secured to the substrate and the mixture is applied. The resist disintegrates upon heating. In another method, used when the substrate is plastic, a mixture of plastic and metal in past form is applied to the substrate by silk screening or pad printing to form the pattern.

Abstract: A method of forming a gold statuette of a three-dimensional object, e.g. a man, is disclosed as including the steps of (1) scanning the man with scanning means to obtain data on his contour and shape; (2) inputting the data into a computer; (3) based on the data inputted into the computer, displaying a virtual three-dimensional image of the man on a monitor of the computer; (4) providing an epoxy resin prototype of the man by a sculpturing machine controlled by the computer; (5) providing silicon rubber mould-halves on the basis of the epoxy resin prototype; (6) providing a wax prototype on the basis of the silicon rubber mould-halves; (7) casting gold onto the wax prototype; (8) removing the wax, in which the scanning means revolves around the man to scan his contour and shape.

Abstract: A process for manufacturing electroformed patterns includes the following steps: forming electroformed closed line graphic patterns and an electroformed line surrounding said patterns (optionally together with an electroformed island) on a surface of a conductive substrate; peeling the electroformed patterns and the electroformed line (optionally together with the electroformed island) from the conductive substrate to transfer them onto a pressure-sensitive adhesive layer provided on a support; injecting or printing a coating material inside the closed line graphic electroformed patterns and converting the coating material to coating films; forming a firmly bonding adhesive layer on a whole surface of the support on its side where the electroformed patterns, the coating films and the electroformed line (optionally together with the electroformed island) are retained; removing the electroformed line (optionally together with the electroformed island); separating the electroformed patterns and the coating films

Abstract: A method of forming a hollow metallic article, comprising the following steps: (a) applying a layer of base metal to a fusible alloy mandrel; (b) applying a layer of precious metal to the layer of base metal; (c) applying a third layer of a non-metallic protective coating to the layer of precious metal; and (d) melting out the fusible alloy mandrel. Hollow articles formed by this method are also disclosed.

Abstract: The invention relates to platinum electroforming and platinum electroplating capable of preparing a deposited platinum material having high hardness and increased thickness and size utilizing an electrolyte bath comprising at least one compound selected from the group consisting of chloroplatinic acid, chloroplatinates of alkali metals, hydrogen hexahydroxoplatinate, and hexahydroxoplatinates of alkali metals, 2-100 g/l as platinum; a hydroxylated alkali metal, 20-100 g/l; and a soluble carboxylate.

Abstract: The process for manufacturing electroformed patterns according to the present invention comprises: forming electroformed patterns and an electroformed line surrounding said patterns (and optionally an electroformed island) on a surface of a conductive substrate; peeling the electroformed patterns and the electroformed line (and optionally an electroformed island) from the conductive substrate to transfer them onto a pressure-sensitive adhesive layer provided on a support; forming a firmly bonding adhesive layer on the whole surface of the side where the electroformed patterns and the electroformed line (and optionally an electroformed island) are retained; removing the electroformed line (and optionally an electroformed island); and adhering the electroformed patterns to a surface of an adherend through the firmly bonding adhesive layer, simultaneously with separating the electroformed patterns from the support. According to this invention, the electroformed patterns can be manufactured at a low cost.

Abstract: A method of electroforming gold jewelry articles utilizes a first gold/silver electroforming bath which is effective for depositing a relatively soft, ductile gold alloy, and a second gold/silver electroforming bath which is effective for depositing a hard, brittle gold alloy. Prior to the electroforming steps, the method includes the preliminary steps of forming a wax mandrel in a desired configuration, inserting a copper wire into the mandrel and applying a conductive lacquer onto the mandrel. The electroforming method includes the steps of alternately immersing the mandrel into the first and second electroforming baths and electroforming alternating layers of the soft and hard gold alloys over each other to form a laminated gold shell. After the last layer has been electroformed, the wax mandrel is melted and removed from the laminated gold shell thereby forming a hollow jewelry article.

Abstract: The invention relates to platinum electroforming and platinum electroplating capable of preparing a deposited platinum material having high hardness and increased thickness and size. The platinum electroforming or electroplating bath comprises at least one compound selected from the group consisting of chloroplatinic acid, chloroplatinates of alkali metals, hydrogen hexahydroxoplatinate, and hexahydroxoplatinates of alkali metals, 2-100 g/l as platinum and a hydroxylated alkali metal, 20-100 g/l.

Abstract: A method of fabricating a hollow jewelry object in which an electrically conductive coating is applied to part (18) of a non-conductive mandrel or mould (10), the coated mandrel being presented for a first dip into an electrolyte containing ions of a precious metal e.g. gold so that the parts of the mandrel are coated with an initial deposit; the mandrel is then removed from the electrolyte and the previously uncoated portions (24) coated before the mould is again dipped in the or a different electrolyte to form an outer shell integral with the internal ribs or points formed during the first dip. Thus the hollow jewelry object is internally strengthened by the ribs; though in an alternative embodiment the ribs can be replaced by individual upstanding projections in bas relief if these conform to the external profile required for the jewelry object. The invention also includes a hollow jewelry object formed by the method according to the invention.

Abstract: The disclosure is directed to an electrodeposition process utilizing molds of original objects. The molds are placed, preferably horizontally, into the electrodeposition bath. The resulting product utilizes the mold-facing surface as the final surface of the product. The disclosure is also directed to a process for making molds useful for the electrodeposition process of the invention. The process is particularly useful for producing metal reproductions of original artworks.