The Chisel
Part I
In lost-wax bronze casting, chiseling is an important phase in the processing of the surface of sculptures; it is performed with special tools called “chisel irons”.
Chisel irons are small steel chisels (called simply “chisels” or “iron”) with a square or round section, with the head (the part in contact with the metal) of different shapes, while the opposite end is intended to receive the hammer blows. (Photo 1,2,3)
Photo 1
Photo 2 | Photo 3 |
This is because the chisel tools are normally used to define and finish with extreme meticulousness the details of bronze castings. They can highlight parts that in casting were less evident than intended (Photo 4,5),
Photo 4 | Photo 5 |
or even create new details on the bronze that had not been modelled on the wax before casting (Photo 6,7); in some cases to flatten and re-beat (with the iron called “flattener”) smooth areas of the bronze that have slight imperfections or small holes that will thus be plugged and disappear.
Photo 6 | Photo 7 |
These cold-work touches enhance the overall sculptural quality, highlighting the play of light and shadow, creating greater depth in some cavities and at the same time sharpening the edges.
The main tools are the profiler (Photo 8,9), the nail (Photo 10) and the smoother (Photo 11).
Photo 8 | Photo 9 |
Photo 10 | Photo 11 |
They can be of different sizes and measures: the nail is used to trace curved lines, the profiler for straight lines, the flatteners to flatten the surface around the drawing as well as flatten porous areas of the bronze. There are also irons that have various designs on the head to be able to imprint them on the surface of the sculpture (Photo 12), others with dots or stars (Photo 13) like those imprinted on the upper part of the warrior from behind (Photo 14).
Photo 12 | Photo 13 |
Photo 14
All the irons are always shiny and frayed on the head due to the continuous hammering on them, which crushes them creating curls of metal (Photo 15).
Photo 15