Dating purple glass
Coloring alone does not provide any indication of the origin of a Murano Glass piece.
By 1886, the company expanded into a new plant facility in Washington, Pennsylvania where it manufactured it's only product--Mason Jar Liners eventually adding opal ointment jars and salve boxes but with advancements in glass manufacturing, methods and the introduction of glass food packaging to the country, Hazel Glass started to grow.
To replace cork caps which were expensive and allow for wider openings in container designs, a third brother opened Wheeling Metal Plant to produce zinc caps for mason jars.
They even experienced some growth because of innovation, diversification and the acquisition of other glass plants and During the 1930s, Hazel-Atlas became well known for their mold-etched, machine-made depression glass patterns.
The Westmoreland Glass Company grew out of the Specialty Glass Company of East Liverpool, Ohio, which, in 1889, relocated to Grapeville, Pennsylvania, to take advantage of the area’s abundant supply of natural gas.
The newly expanded corporation broadened its production to include economical tableware opening a plant in Clarksburg, WV to produce homewares earning itself the name The World's Largest Tumbler Factory.The Hazel Company continued to manufacture items from opal glass and began expanding its commercial bottle and jar lines.With competition from Libbey Glass mounting and because of the development of a patented piece of equipment that increased glass production automation, a 3rd company was formed called Republic Glass Company.Hazel Glass Company aka Hazel Atlas Corporation was formed in 1885 by two brothers, Charles N. The new company made pressed tumblers utilizing a newly developed automatic press. This company later became part of the Hazel-Atlas Corporation. With competition from Libbey Glass mounting and because of the development of a patented piece of equipment that increased glass production automation, a 3rd company was formed called Republic Glass Company.