[Jewelry making - Article 00284] - expansion/shrinkage

[Markus Ellermeier]

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    Hi all, 
    yesterday there was some discussion about casting. An old master
    goldsmith told me that in making models for sand castings, he had to
    provide for expansion of the castings (making the models smaller) as
    opposed to the models for vacuum or centrifugal casting. But another one
    said it were not true, but sand castings would shrink also. Is anybody out
    there able to verify the one or other opinion from his/her experience?
    Markus


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