Spinal disks and ribs

My first project of the semester is going to consist of bronze castings, metal fabrication and use of other materials such as glass, mirror, and found objects. 

I prefer to being in water based clay for what I am going to ultimately cast in bronze. 

Here are the planning sketches for how I will construct the molds. Planning out the air passages and how the rubber will release from the molds

A clay wall is built for a two part rubber mold

 I built a wood box to contain the rubber