The Kunstgiesserei mainly casts models using the lost wax technique: First, a wax copy is created from the original. A heat-resistant form made of chamotte, ceramic, or sand is then produced. The wax melts out in an annealing furnace, creating the hollow cavity for the metal. Various molding techniques are used depending on the model and surface condition. The casting is then done in copper alloys such as bronze, brass, and nickel silver, or in metals such as aluminum or iron.

Depending on the surface finish desired, the post-processing of the piece can vary quite a bit. If a figure is cast in multiple parts, these are first put together and welded, and the weld seams and surfaces are afterward chased and patinated.

You can read an in-depth description of the lost wax technique and all of the steps in the process based on the example of the Rampin Rider. The process is also exemplarily documented in detail based on the molding of the Broderbrunnen by August Bösch.

Anne Chu: Bear