Lost wax brass casting
Welcome to the fascinating world of lost wax brass casting, a traditional art form practiced for centuries in Krofofrom, in Kumasi, Ghana. This intricate process transforms beeswax models into stunning brass pieces, showcasing the skill and heritage of Ghanaian artisans.
Here's how...
Creating the Wax Model
The journey begins with beeswax, softened in fire or warm water for artisans to design and shape the wax into pendants, figures or beads. They use moulds to pack in the wax and scrape off the excess, or design freehand with their fingers and simple tools. Detailed features are added with wood tools and wax threads, making each piece unique. The designs are often of Adinkra symbols, animals, masks or beads, but the possibilities are endless and I've even seen jibbitz for Crocs!
Building the Mould
The wax models are dipped into a fine slurry of charcoal, water, and clay. This initial coating captures every detail. Next, wax rods are inserted to form channels for the molten brass and groups of 20 models are re-dipped in the slurry. Next, a coarser mix of palm fibre and clay is applied to strengthen the mould.
Casting the Brass
The moulds are placed in a kiln, where gradual heating melts the wax, leaving a hollow cavity in the shape of the beeswax designs. Once the wax is removed, molten scrap brass is poured into the top. It travels down the channels made by beeswax rods and into the cavities. This step requires precision to ensure the brass fills every part of the mould.
The Big Reveal
After cooling, the moulds are broken open, revealing the brass pieces. The rods holding the group together are cut off and rough edges are smoothed with grinders or sandpaper. The brass is polished using lemon juice and wire brushes, bringing out a beautiful shine.