Eschenbach porcelain, Winterling porcelain, Triptis porcelain, hotel porcelain, houshold porcelain, chinaware, hotel chinaware, houshold chinaware

With grey streaks on the porcelain surface it mostly concerns depositions of your cutlery by the everyday use. You get this carefully away with a porcelain cleaner. Different companies (e.g., Etolit) offer such cleaners in the specialized trade.