Rubber and Plaster

One of the projects I'm currently working on has to do with making plaster casts from a rubber mould.  I sculpted a small and somewhat abstract head using tin foil and then made a rubber mould of the foil head.  Presently I am making a bunch of small plaster heads, I'll make about ten of them and I plan to manipulate each one to make them all slightly different than each other.
Here is a shot of the first head.