Re: Investment life


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Posted by bpfink on April 03, 19100 at 06:32:46:

In Reply to: Re: Investment life posted by bpfink on April 02, 19100 at 08:56:45:

I neglected to mention that one of the other reasons the burnout works better, and is likely to take less total time if the investment starts out really wet is because the wax in it's early stages of meltout can not soak into the plaster nearly as much as if the plaster were porously dry. Water is a great wax to plaster separator... the very thing to use on plaster molds also when making multiple wax casts from them.

The greatest amount of time needed for a burnout is often that period where the wax residue that has soaked into an investment is being burned back out.

I base this on inspections of the later metal poured investment when broken open and any darker color changes in the depths of the mold away from the final metal surfaces.

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