Quote Originally Posted by pixelfixed View Post
Bell jar and a pump on a small scale DIY program will work fine,Vacuum is vacuum,neat looking device for sure.
Sure it will work if you are using a consumer wood hardener, and your desired end result is just an easier to work piece. Using it at a vacuum level past whats needed to preserve coffee starts to get unsafe fast.

As far as using one for professional, or similar resins, it would implode far before it reached the required -30psi for absorption. For that you need steel or aluminum (or at least PVC) walled pressure vessels.

However, A ball jar could be used in vacuum dying thin pieces of wood like veneers if you wanted to do that.