Optical moulds - adding textured pattern to the glass
Optical or dip moulds have been used for centuries to add texture to the surface of blown glass. A cylindrical or truncated conical one-piece form with a patterned interior, the mould is open at the top so that glass can be dipped in to create a pattern on the exterior of a gather of glass or on a bubble. Traditionally they are made from cast brass or aluminium but newer des...
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