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Southwestern Pennsylvania's glassmaking tradition dates from late 18th century

A glass piece can be seen at the L.E. Smith Glass Co. plant in Mt. Pleasant after just having been taken from the mold that formed it in this 1999 file photo. The glass is still glowing from the heat and can be seen sitting between jets of air that help cool it down.

The closure of the Pyrex cookware plant in Charleroi brings to an end 132 years of manufacturing at that facility, but the regional footprint of the glassmaking industry is far more widespread and earlier in origin.


Source: The Tribune-Review