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Fourcault process machine operators require experience in order to judge placement of the die, location of various parts of the process, and rates of draw. These must be balanced against glass quality and the age of the draw. As the draw continues the glass in the pit grows cooler and cooler, eventually leading to failures or diminished quality.
Drawing is a manufacturing process that uses tensile forces to elongate metal, glass, or plastic. As the material is drawn (pulled), it stretches and becomes thinner, achieving a desired shape and thickness. Drawing is classified into two types: sheet metal drawing and wire, bar, and tube drawing.
Machine drawn cylinder sheet was the first mechanical method for "drawing" window glass. Cylinders of glass 40 feet (12 m) high are drawn vertically from a circular tank. The glass is then annealed and cut into 7 to 10 foot (2 to 3 m) cylinders. These are cut lengthways, reheated, and flattened.
The key advantage of this technique as compared to the float glass process is that the pristine surfaces are not touched by molten tin. The technique is used for the production of very thin flat panel display glass by the companies Asahi Glass Co. , Corning , Nippon Electric Glass , [ 1 ] Samsung Corning Precision Materials , and various other ...
Tube sinking, also known as free tube drawing, reduces the diameter of the tube without a mandrel inside the tube. The inner diameter is determined by the inner and outer diameter of the stock tube, the outer diameter of the final product, the length of the die landing, the amount of back tension, and the friction between the tube and the die. [3]
This is a simple process for the reproduction of any light transmitting document. Engineers and architects drew their designs on cartridge paper; these were then traced on to tracing paper using India ink for reproduction whenever needed. The tracing paper drawing is placed on top of the sensitized paper, and both are clamped under glass, in a ...
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Stained Glass- an Illustrated History, Bracken Books, ISBN 1-85891-157-5; Painton Cowen (1985). A Guide to Stained Glass in Britain, Michael Joseph, ISBN 0-7181-2567-3; Husband, TB (2000). The Luminous Image: Painted Glass Roundels in the Lowlands, 1480-1560, Metropolitan Museum of Art; Lawrence Lee, George Seddon, and Francis Stephens (1976).
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