METHOD OF CASTING
METHOD OF CASTING
The most popular process of metal casting is called "Cire Perdue". It is done in two ways. In a first way (solid), initially a wax model of the desired sculpture is prepared. Over this, a mould is made of plaster and surakhi. When it becomes hard, the wax is melted out and the plaster mould is ready. Then the molten bronze is poured into this mould. After solidification of bronze, the mould is broken and the sculpture is finalized by chasing and furnishing.
By the second way, hollow bronze casting is done. Initially in this method, a clay model of the desired sculpture is made and is coated with layers of wax to produce all the details of the form. Afterwards, it is again covered with a thin layer of fine clay. After being dried up, it is again repeated so that a thick outer shell is formed. This is called negative. When the negative is heated, the wax melts and comes out through the openings, leaving a space between the clay model and its negative. Finally, the molten liquid metal is poured to get the desired sculpture. After being cooled, it gets hardened; the outer shell is broken. The figure is finely chased with a chisel and then polished.
By the second way, hollow bronze casting is done. Initially in this method, a clay model of the desired sculpture is made and is coated with layers of wax to produce all the details of the form. Afterwards, it is again covered with a thin layer of fine clay. After being dried up, it is again repeated so that a thick outer shell is formed. This is called negative. When the negative is heated, the wax melts and comes out through the openings, leaving a space between the clay model and its negative. Finally, the molten liquid metal is poured to get the desired sculpture. After being cooled, it gets hardened; the outer shell is broken. The figure is finely chased with a chisel and then polished.
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