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Re: [ATM] 20" *glass* tool
Regarding Hydrostone...
Hydrostone and Hydrocal are not the same things as
dental stone. Completly different products. Also
Hydrostone and Hydrocal are not similar to each other.
One is water proof, the other is not. You can find
out more by searching the net for Hydrostone. There
you will find a complete spec from the manufacture US
Gypson I think.
I think you can also find more info in the archives
but I might be mixing up what list it was on.
Dale Eason
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