Copper Plaque done by F. Lavastre (French artist, 19th century)
About Copper Plaque done by F. Lavastre (French artist, 19th century)
A pure electrotype plaque is a sophisticated art object produced by using electrolysis as the following steps. Based on drawing, engraver molds an original modeling clay. Plaster is then used to produce a negative mold. After graphitized on the surface, the plaster model is soaked in a copper sulfate solution tank as negative electrode, while a copper plate is used as a positive electrode. The tank is electrified for 120 to 220 hours to form 1 to 1.5 mm thick copper electrode posit on the whole graphitized surface. The electrode posited copper, peeled off from the plaster model, is polished and then finished with chemical dye or gold- or - silver- plating.
12.5”h x 10.5”w x 1.5”d
Signed, dated 1853 lower right