The Encyclopedia of Founding

Twelve hundred entries from the golden age of cast metal — how bells are founded, why brass is not bronze, what a cupola melts and a core withstands — by Simpson Bolland, the trade's great teacher.

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Sulphur Impressions

These impressions of medals, gems, or any other delicate object may be obtained easily by using sulphur when it has been made to assume the soft or pastry condition (see SULPHUR). Or, melt the sulphur and increase the heat until it becomes brown; then pour into a vessel, and just before it hardens press the object enough to obtain a good impression. See MEDALS.

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