Tibetan Buddhist Copper Gau Box from Nepal

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Nepalese statues and sculptures are best known for their unique small religious figures and ritual paraphernalia for over two thousand years. These are mainly cast in copper alloy. Nepal draws influences from the artistic styles of Buddhism and Hinduism, and therefore the sculptors of the country specialize in making the icons of both these religions. Over the years, Nepalese sculptures evolved into their own distinctive iconography. Some characteristic features of these sculptures that differ from other pieces are exaggerated physical postures, youthful and sensual features, languid eyes, wider faces having serene expressions, and ornate flourishes. The Buddhist deity icons of Nepal have tremendous demand in countries such as China and Tibet for ritual purposes in their temples and monasteries.

Nepalese statues and sculptures have a high copper content and therefore develop a slightly reddish patina on the surface as they age. However, the most unique feature of Nepalese copper statues is their decorative detailing. The pieces are heavily gilded and sometimes inlaid with semi-precious stones. This embellishment protects them from getting tarnished. The traditional lost-wax method for casting Nepalese copper statues remains the most practiced technique in Nepal for many centuries. This process involves many steps and requires skilled artists.

The first step in lost-wax sculpting is to make a wax replica of the desired Buddhist deity to be cast in copper. This replica is created by hand and therefore needs excellent artistic skills otherwise fine features will be lacking.

Once the wax replica is made, it is then coated with a special mixture of clay with a brush. This layer of clay is hardened when left to dry. A small hole is made on the base of the wax mould so that the wax flows away when it is heated.

The artist works on the details of the statue using various tools. It is then polished to get a shiny and lustrous surface.

Now comes the most important part of Nepalese art which is gold gilding. This is done by the traditional fire gilding method. A mixture of mercury and 18K gold is applied on the surface of the statue and heat is applied using a flame torch. The result is that mercury evaporates along with impurities, leaving a pure 24K gold finish.