Traditional Indian Bastar Dhokra: Bell Metal Architectural Hardware & Lost-Wax Casting

In the dense Sal and Teak forests of the Bastar plateau in southern Chhattisgarh, the Ghadwa community preserves one of humanity's oldest continuous metallurgical traditions: Dhokra bell metal casting. Deriving their name from the vernacular verb ghadna (meaning to create, sculpt, or fashion from raw materials), Ghadwa metal artisans have served as the vital sculptural and technological spine of indigenous tribal architecture and ritual life for millennia.

Historically, Ghadwa craft was deeply entwined with tribal cosmology and domestic sanctity. In traditional Bastar settlements, timber dwellings constructed from heavy Sal logs and woven bamboo required protective talismans and durable mechanical fittings. Ghadwa metalsmiths cast every structural and decorative fixture—from heavy entrance portal handles (dwar kadi) and sliding door bolts (chitkani) to ceremonial oil lamps (diya) and temple pillar brackets. Imbued with sacred effigies of local animist deities—such as the mother goddess Danteshwari, horned forest spirits (Anga Dev), elephants, and sacred peacocks—these architectural hardware pieces served both as physical security devices and spiritual wardens guarding the threshold of the home.

The technical genius of Bastar Dhokra lies in its absolute reliance on natural, locally harvested forest materials transformed through green chemical principles. The foundation of every casting is termite mound clay (deemak mitti). Harvested from the towering nests of subterranean termites, this clay has undergone natural biological refinement: termites process the mineral earth with enzymatic saliva, creating an ultra-fine, homogeneous clay with exceptional green strength and thermal elasticity.

This clay is blended with charred rice husks (bhusa) and aged cow dung. When the mould is fired, the organic rice husks and dung burn away completely, leaving a micro-porous network of capillary channels through the clay walls. These microscopic pores allow superheated gases and steam to escape harmlessly during metal pouring, preventing the explosive mould fractures common in dense modern ceramics. For the sculpting medium, artisans melt wild forest beeswax (mom) harvested by tribal gatherers, combining it with powdered resin (ral or dhuna) tapped from the native Shorea robusta (Sal) tree and a splash of cold-pressed mustard oil. The Sal resin provides structural rigidity and sharp edge definition, while the mustard oil imparts remarkable tensile elasticity, allowing the wax to be extruded into gossamer-thin threads without snapping.

Unlike classical European or Greco-Roman lost-wax casting—where artists carve or model wax in solid masses—Bastar Dhokra is distinguished globally by its thread-wound construction. The artisan does not carve the design; rather, the entire surface is woven from continuous strands of extruded wax.

Using a traditional handheld brass or hardwood piston syringe known as a jat or pichki, the artisan forces warm, pliable wax through a perforated metal die, generating yards of uniform wax wire measuring 1 to 2 mm in diameter. Working with rhythmic dexterity, the craftsman wraps these threads around the pre-fired clay core in tightly touching parallel coils. Secondary layers of coiled spirals, braided cords, and crisscrossed filigree are layered over the base threads to articulate facial features, jewelry, and geometric bands. Because the clay mould is shattered after firing to liberate the bronze, every single Dhokra architectural hardware piece is a unique original (pièce unique); no master mould or silicone matrix exists, ensuring that each handle and latch bears the individual thumbprint and spontaneous creative spirit of the metalsmith.

The casting phase of Dhokra represents an ingenious metallurgical closed-loop system known as integral crucible casting. In conventional foundries, metal is melted in an open crucible and poured into a separate, cold mould. In Bastar, the crucible and the mould are physically joined into a single monolithic unit.

At the top of the clay-encased wax model, the artisan fashions a hollow clay cup (katora). This cup is filled with precisely weighed fragments of scrap bell metal (kansa—an alloy of 78% copper and 22% tin) and brass, and the cup is sealed airtight with a heavy cap of clay mixed with jute fiber. The entire monolithic assembly—containing the raw metal at one end and the hollow wax model at the other—is buried in a shallow ground pit furnace (bhatti) fueled by hardwood charcoal and Sal embers. As hand bellows pump air into the fire, the assembly reaches 1100°C. The wax melts and vaporizes into the porous clay, while the bronze liquefies inside the sealed crucible. Using long forged-iron tongs, two artisans lift the glowing assembly from the embers and perform the swift, decisive inversion: turning the mould 180 degrees. Molten bronze rushes downward through internal sprues, filling the negative void left by the burned wax in a fraction of a second. After cooling in ambient air, the clay shell is cracked open, revealing a gleaming, gold-toned bronze architectural masterwork.