Vacuum for investment

An excellent de-bubbler (to enable the bubbles to slip off the wax)
is a 50/1 solution of ordinary washing up liquid. It works for me!

I’m also really careful as to how I mix the plaster. I mix slowly,
trying not to include any air, and use BOILED cold water instead of
regular tap water.

These days I have a vacuum casting unit but I got really good results
in my youthful days using a potato and a small tin can!

Tony Konrath Gold and Stone www.goldandstone.com
tony@goldandstone.com

These days I have a vacuum casting unit but I got really good
results in my youthful days using a potato and a small tin can! 

A Potato? Please advise.

-Jade