Casting is one of the earliest known forms of metal working. In its most basic form, it involves heating metal until it is molten and then pouring it into a mold. As the metal cools it takes the shape of the mold. Early castings were crude in finish with a lot of surface anomalies that required a great deal of machine work to get the desired quality of surface texture. Modern casting techniques produce very fine tolerances and the casting requires little or no finishing work.
Besides, idols that had been objects of worship, even if for a day, were no more permitted to be taken out of Nepal since they were now a part of living culture.
Students will create a piece of work choosing their own design either from a pattern, drawing or photograph to transform from a wax model into a sturdy and beautiful bronze artwork. Designs are carved in wax, then centrifugally cast in this non-toxic, beautiful and hard alloy. Students can make a pendant, earrings, charm, small statue or key fob.
If the artist utilized the fusione metalli of casting, then a wax “lining” is added to the mold. The completed wax sculpture is then heated until the wax melts and runs out. The space that is created is then filled with molten bronze. This process produces a sculpture that is very fine in detail. Sandblasting, polishing and assembly follow.
As far as metalwork is concerned, Nepal has numerous artifacts in bronze and copper dating back to10th century A.D. Most of the statues were made by using the Cira Perdua (Lost Wax) method. The selected object was first modeled in wax, then coated with clay leaving only a small opening. After the clay mold had dried, the wax was melted and poured out. Then the wax was replaced by molten metal. After sufficient cooling, the clay mold was broken to reveal the cast image.
They are obviously referring to the hue and cry about stolen idols and so are wary of dealing in the same. They are right of course. In earlier years, news about precious idols stolen from temples and elsewhere used to be a regular item in newspapers. Even caretakers, including priests, were said to be involved. It was a fact that such misdeeds occurred under the protection of many high placed officials in government and law enforcement agencies.
Thereafter the cut piece is pounded out with a mallet to flatten the silver and to temper it. Silver pieces are then pounded over some kind form, which would give the desired shape to pendant. Pounded silver gives a unique look because of the marks left by the mallet. Moreover it ensures that each piece is one of a kind, and no other silver pendant will be like yours.
Given the number of options that aluminum presents to the caster finding the right casting method will involve some time. To help decide which aluminum casting process is best consider factors like quality and cost.