proceso del vidrio. velazquez, gonnet, gauchat
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description of a process. passive voiceTRANSCRIPT
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PROCESS OF GLASS
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GLASS COMES FROM EGYPT. THE MANUFACTURE OF GLASS BLOOMED IN EGYPT AND MESOPOTAMIA UNTIL 1200 A.C. And LATER IT STOPPED ALMOST COMPLETELY FOR SEVERAL CENTURIES. EGYPT PRODUCED A CLEAR GLASS, WHICH CONTAINED PURE SILICA; THEY COLORED BLUE AND GREEN. BESIDES GLASSES THEY ALSO DID FIGURINES, AMULETS AND STONES, AS WELL AS GLASSY PIECES FOR INLAYS IN FURNITURE.
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THE GLASS IS MADE FROM SILICA, SAND, CARBONATE OF LIME, AND SODIUM MOLTEN ALL AT 1500 ºC.
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THE MIXTURE IS SENT TO THE SILOS WHERE IT IS READY TO BE LOADED INTO THE FURNACE.
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THE FURNACE CONSISTS OF A RECTANGULAR CONTAINER WHERE THE RAW MATERIALS ARE MELTED.
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AFTER THE REFINING PROCESS THE BUBBLES ARE REMOVED.
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THE GLASS TEMPERATURE IS DECREASED GRADUALLY TO GET THE GLASS IN A STATE THAT CAN BE MODELED.
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FINALLY IT GOES THROUGH A PROCESS OF COOLING WITH WATER AND THE GLASS PIECE IS READY.
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INTEGRANTES:
Velazquez Georgina.
Gonnet Camila.
Gauchat Salvador.