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Pressed glass (or pattern glass) [1] is a form of glass made by pressing molten glass into a mold using a plunger. [2] Although hand pressed glass has existed for over 1,000 years, the use of a machine for pressing was first patented by Pittsburgh glass man John P. Bakewell in 1825 to make knobs for furniture.
Blown three-mold glass was sometimes called “prest” (pressed) because the glass was blown into a mold and “impressed” with a design. [29] Various names for blown three mold glass have been used by collectors since its rediscovery in the early 20th century. It was first called “Stiegel glass” by collector Frederick W. Hunter because ...
Indiana Glass Company was an American company that manufactured pressed, blown and hand-molded glassware and tableware for almost 100 years. Predecessors to the company began operations in Dunkirk, Indiana, in 1896 and 1904, when East Central Indiana experienced the Indiana gas boom.
Glass was not pressed in the United States until the 1820s. [8] 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]
Although pressing glass by hand has long existed, mechanical pressing of glass did not exist until the 1820s—and it was an American invention. [8] In some cases, the glass is cut and polished, engraved, etched, or enameled. [9] All glass products must be cooled gradually , or else they could easily break. [10]
Pressed glass: The most important innovation for the 1820s was the development of machine pressed glass—pressing glass into a mold. [21] Although pressing glass by hand had long existed, mechanical pressing of glass did not exist until the 1820s—and it was an American invention. [ 29 ]
Higher quality glass became more available when American glass man Deming Jarves, sometimes called the "father of the American glass industry", developed a way to produce red lead from domestic sources of lead oxide. [138] The most important innovation for the 1820s was the development of machine pressed glass—pressing glass into a mold. [139]
Hobnail glass is pressed glass with a pattern of raised bumps. It was created in 1886 at Hobbs, Brockunier and Company by William Leighton Jr. and William F. Russell. [85] Their patent, No. 343,133, discussed projecting nodules and improvements in "pressed opalescent glassware". [86] This style was the company's pattern 323.