Bronze is one of the world’s oldest alloys made by man. About five thousand years ago, in the bronze age we began to cast objects and the technology used was extremely advanced. With the help of molds, different types of tools were manufactured. In the 19th century, sand molding/cuttings with hardened sand were added. This was best suited for the casting of larger sculptures. The craft itself is almost the same to this day.
The sculptor’s gypsum model is being placed in molding sand. Prepared hardened sand is laid around the model so that it does not get stuck when the latter is to be removed from the mold. In the sand, cavities are made for different channels for air and for the liquid metal which will later flow into the mold. More sand is applied on top and then the lid is put on the mold and the frame is turned over.
In the next step, the molding sand and plaster model are removed and now we have a precise impression of the gypsum model. A layer of plastic lining is laid in the same thickness as the bronze.
An inner core of hardened sand is created to form the cavity of the fixed sculpture. The plastic lens is removed and the front and back sides are assembled and the mold is ready for the liquid metal.
Floating bronze that is about 1030-1100 degrees warm is poured into the mold and the bronze finds its way down through pre-prepared channels. The liquid bronze solidifies, the mold opens and the sand form gets destroyed (so-called lost form) and the bronze appears.
After the sculpture has been cast, it is cleansed from all its ducts where the bronze has moved in and made clean from residual products such as sand and other.
After that, the parts are joined to the sculpture and the work is patinated (treated with salts, acids and other chemicals) to the desired color. The sculpture is put in several stages and is now ready for delivery.
The sculpture parts are joined together and the art piece is getting patinated (treated with salts, acids and other chemicals) to the desired color. The sculpture is then getting polished in several stages and is now ready for viewing.