Mould Making and Casting
The process of making a bronze cast is comprised of four main stages as detailed below:
Moulding in Silicon rubber
The initial stage of casting requires a mould of the object to be made. Silicon rubber ensures the highest quality cast with the minutest surface details replicated in the mould.
In the next stage a wax cast is created from the Silicon mould. This is then carefully re-touched by hand to guarantee a perfect match to the original.
Treeing and Investing
Long wax rod segments are then attached to the cast, known as 'trees' or 'runners'. These connect into a solid wax cup that later, during the casting process form the channels through which the bronze runs into the mould. The wax cast is then invested and fired to remove the wax, leaving the negative space of the object ready to be cast into bronze.
In the last stage of the casting process, bronze is melted in a crucible from the furnace and then poured into the prepared mould.
Once the cast is complete, the objects are then 'chased'. The cast is broken out of the investment and blasted clean of oxidization. The runners are cut off and the final object is welded together if originally cast as separate parts. The bronze is then restored and finished with polishing and patination.