casting flash

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A thin irregular ridge of metal on the outer face of a casting, resulting from seepage of the molten metal into the joint between the separate components of the mould used in its manufacture. A casting jet is similar but is a small plug of metal that originally filled the gate or aperture used to fill the mould. During the final cleaning and finishing of a cast object the jet and flash are usually knocked off and filed smooth.

Subjects: Archaeology.

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