Patent ID: 7645371

Claim:
A process for formation of a ceramic coating on a silver or silver-plated article to prevent surface tarnish of the article, comprising 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 or silver-plated article with beryllium in an electrolyte containing beryllium sulfate (BeSO 4 .4H 2 O) by an electroplating method; buffing the article plated with the beryllium film, and washing and drying the buffed article using a surfactant; and forming a resultant ceramic coating by dipping the dried article in a ceramic coating solution which includes 20 to 80 cc of liquid sodium silicate (glass water 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.