After the rubber mold is completed, the hard-shell mold is applied over it in stages. Again a clay shim wall is used to keep the hard-shell sections separate. There are 3 pieces to the hard-shell mold. This part of the process takes about one day and with that, the mold is complete.
The mold is then carefully taken apart, and the original sculpture is removed. The original has no other use now and I can reuse the clay for another sculpture. The mold is cleaned up and checked for fit, then reassembled and held together with bungee cords, turned upside down in a bucket and the resin is poured in through the sculptures base (feet) area. The resin hardens in about 30 minutes, then the mold is removed and the cast piece is cleaned up as needed. At this point the resin is still very warm, but after a few hours it is cool enough to prime and paint. The casting and painting process takes about a day and a half to complete.
What is cast resin? Resin is liquid plastic. Two separate liquids that when mixed together react to create a quick hardening solid peice. The type used for casting sculpture is capable of reproducing the smallest details and is extremely hard when cured (dry) and it's paintable.
Why resin? Cost. The artist can make the mold and cast small pieces in the studio. Resin is not cheap, but compared to casting bronze, and paying a foundry to do all the work involved with that process, resin is less costly and allows the artist to sell the pieces at more affordable prices than similar sized bronze sculpture.