Thermal processing has played a key role in making Industrial Heating’s home city of Pittsburgh great. I know you’re thinking of steel, and you would certainly be right. But did you know that almost a century before steel began its run in Pittsburgh, the Pittsburgh Glassworks was established in 1797? By 1900, there were more than 100 glass factories in Western Pennsylvania.
It is believed that glass was first discovered in ancient Egypt as a by-product of ceramic firing. According to experts, glass was first produced independently of ceramics around 1,500 BC. From then until the late 1820s, all glass was handmade. Beginning in 1827, the first machine technologies were introduced. Little more than a decade later, Pittsburgh was the pressed-glass capital of the world. By 1920, 80% of America’s glass was made in Western Pennsylvania.