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Crown glass

- a method of producing glass in which a globe is transferred from the blowpipe to a pontil or punty, reheated and then spun until it opened up into a large flat plate - a table of crown glass. It often has a greenish tinge, curves slightly and can have small radial imperfections, all of which can give the glass a wonderful reflective quality. While more costly to produce through the wastage associated with its circular shape, because it does not come into contact with any surface during manufacture, it is more transparent than cylinder glass.