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Posted by: Henry ® 03/10/2004, 22:06:32 Author Profile Mail author Edit |
Glass is made from predominantly sand (silica) how does this solid become clear in the finished process. Is there a chemical change under heat? |
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Posted by: astroracer ® 03/11/2004, 14:32:33 Author Profile Mail author Edit |
Silica in it's pure form is clear. Sand has impurities in it which gives it "color". Once the impurities are removed you end up with a clear silica... Which makes excellant glass. |
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