I have used protoplast to make impressions. It is tricky. I have not
had a chance to burn it out yet.
However I would like to know if anyone knows of a burnout-able
impression material that is clay like in texture and use. I have
tried every wax I could find from sprue to actual sealing wax to make
impressions of glass and stone intaglios with poor results. Sculpy
and Fimo make great impressions, but can’t be burned out, so I’m