by Green Skin » Thu Dec 13, 2012 3:44 am
I've got a few PDF's that cover how to mold and cast heads. They are from Black Arachis and they are the same PDF's I used when I was learning how to cast, they should answer the majority of your question. Give me an email to send them to, or tell me where to upload them for public viewing, and I'll gladly share them.
Generally a 1 pc mold is what you'll want for casting heads. I've heard of people using 2 pc molds, but I have yet to see a head I can't mold using a 1 pc.
Generally you will be pouring the molding material onto an upside down head. This allows the material to sink into the neck hole and it prevents airbubbles from forming under the nose. Air bubbles are to be avoided at all costs so you want to position the head upside down since it minimizes bubble when molding, and also while casting.
Honestly it seems a lot more complicated than it really is. Once you do a few of them you'll get the hang of it in no time. Also don't be afraid to mess up a mold or two, it's part of the learning process and everyone does it at some ponit.