To make a mold for bronze casting, several coats of rubber are "painted" on the clay model. After the rubber hardens,
a plaster jacket is made to hold the rubber in place while hot wax is sloshed inside the mold. Thus, a wax replica of the artist's clay model is created with detail so exact, it can include the artist's fingerprints.
Below is the clay model of my new eagle study, ready to mold.
Trish is an excellent mold maker and makes all of my molds.
Below, she applies the first coat of rubber . . . called the print coat. This coat is thin and picks up detail.
Notice the supports under the wings: This prevents sagging from the weight of 5 coats of rubber.
Also, one of the eagle's legs had to be cut off so the wax could be pulled from the mold.
The leg is molded and cast separately, then welded and attached in metal.