Process of ceramic coating for silver or silver plated

摘要

A process of ceramic coatings on silver or silver-plated articles is developed in order to prevent surface tarnish, which are employed as ornaments on bags, garments or accessories such as necklaces, earrings, etc. Such a process comprises the steps of: forming a beryllium film on the surface of the article by fixing a stainless steel plate to an anode, fixing the silver or silver-plated article to a cathode and plating the surface of the silver-plated article with beryllium in an electrolyte containing beryllium sulfate (BeSO4.4H2O) by an electroplating method; buffing the article coated with the beryllium film; washing and drying the buffed article using a surfactant; forming the resultant ceramic coating by dipping the dried article in a ceramic coating solution which includes 20 to 80 cc of glass water (liquid sodium silicate) No. 1, 5 to 60 g of sodium metasilicate, 5 to 30 g of sodium tungstate, 5 to 10 g of molybdic acid in 1 liter of water; and drying the wetted article.