GOLD-SILVER FOIL, AND METHOD FOR PRODUCING GOLD-SILVER FOIL

• Main Authors: MIYAZAWA YUKIO, ONO TAKESHI
• Format: Patent
• Language: English
• Published: 04.09.2008
• Subjects: CASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FOODS OR FOODSTUFFS; FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J; HUMAN NECESSITIES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES; TRANSPORTING; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide foil in which gold and silver are integrated in the surface and rear, where gold and silver harmless to the human body even if being used for food are integrated, thus the respective healthy actions of the gold and silver to the human body are efficiently brought out, and further, which can be inexpensively provided without damaging gorgeousness. SOLUTION: The gold-silver foil is obtained by integrating gold and silver in the surface and rear. As the integrating means, desirably, the one where the gold-silver foil is provided with a surface-rear integrated structure by a means of vacuum deposition, the ratio of the gold is desirably controlled to 10 to 90% by weight, and the gold-silver foil may be finely pulverized, so as to be a powdery shape. Further, regarding the method for producing the gold-silver foil, by a method where gold and silver in a prescribed ratio or an alloy of gold and silver is stored in a boat within a vacuum vessel, and vacuum deposition is performed while gradually increasing the temperature, thus the silver is first vapor-deposited and the gold is next vapor-deposited by a difference between the melting point temperatures of the gold and silver, so as to form the gold-silver foil. When a mask with an extraction shape is used, the gold-silver foil having a specific character or shape is formed on a sample. COPYRIGHT: (C)2008,JPO&INPIT