Lustri L5 - Designer Lamps - Ceramic pendant
Traditionally, the technique of luster is obtained by applying a paste of metal salts on the surface of a ceramic product already cooked and decorated, which must be subjected to further cooking in the so-called “muffle” (the furnace chamber) in an atmosphere without oxygen so that the metal salts can be transformed into pure metals.
Metal particles are incorporated in the enamel, softened by heat, causing that changing effect that is typical of luster.
There are several techniques to achieve this type of decoration. In the luster done by kneading, metal salts are added with an earthy excipient which is removed after cooking; in luster done by acid, salts are dissolved in a solution of acetic acid, while the luster varnished is obtained by adding the metal salts to the composition of a glassy coating.
Other techniques are those of the luster obtained by volatilization and by resin. The technique used in our collection is the casting luster, containing a layer of the following precious metals: 24 carat gold, 22 carat platinum and copper entitled to 90%.
The procedure starts from the object out of the mold that, cleaned and dried, is fired at 1000° and then glazed by immersion; the enamel is then sprayed and subsequently subjected to a second cooking at 995°. Then the pendant proceeds to the decoration of the luster: spreading with a brush, with a steady and precise hand, the different deposits of precious metals previously described (gold, platinum or copper). It continues with a further third cooking at 750°.