Can you use a Plaster mold as a Blow mold? Answered
I wanted to make a hollow plastic shape & not able to afford a metal blow mold. Can I use a plaster mold with wood reinforcement as a substitute for the metal one?
The Idea is to heat up a plastic bottle that can fit in the mold cavity & slowly blow it up with an air compressor.
You think this might work, or do you think I may need more reinforcement in the plaster?