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A very important advance in glass manufacture was the technique of adding lead oxide to the molten glass; this improved the appearance of the glass and made it easier to melt using sea-coal as a furnace fuel. This technique also increased the "working period" of the glass, making it easier to manipulate.
The vast majority of glass windows were produced by the cylinder blown method, although possibly on a smaller scale than the classic methods mentioned by Theophilus. Some Anglo-Saxon window glass was produced by the crown method and at Repton thick pieces of window glass with swirling layered surfaces were possibly made using the cast method. [15]
Until the 20th century, window glass production involved blowing a cylinder and flattening it. [9] Two major methods to make window glass, the crown method and the cylinder method, were used until the process was changed much later in the 1920s. [10] All glass products must then be cooled gradually , or else they could easily break. [11]
In his corner office at Corning Inc.’s towering steel-and-glass headquarters in Corning, N.Y., CEO Wendell Weeks keeps a small, yellowed piece of paper in a dark wood frame behind his desk ...
An 1884 United States government report used glassware, bottles, windows, and plate glass as major categories—although plate glass accounted for only four percent of the value of all glass made. Although window glass was made using the Crown method or the Cylinder method at the start of the century, the cylinder method was dominant by mid ...
German workers were used, and production of window glass is believed to have begun in 1786. [108] De Neufville was a poor financial manager, and the glass works was abandoned by 1790. [109] James Caldwell and associates renovated the abandoned factory in 1792 and began producing window glass. He called his factory the Albany Glass House. [110]
The following 89 pages are in this category, out of 89 total. ... Corning Museum of Glass; Crown glass (window) Cut glass; D. Depression glass; E. Early American ...
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