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Section 8: Metal Oxides: Does Does Stained Glass Get Its Color?
Terms in this set (7)
List some metal oxides that are used in glazing.
Iron oxide, manganese oxide, cobalt oxide, etc.
Why are uranium salts no longer used in glazing?
Because it was radioactive
Why is it a bad idea to use lead in ceramic objects that are used to serve food?
Because lead is poisonous.
Why did early glass have a green tint to it?
Because of light absorption of the iron contained in the glass as an impurity.
Glass artists in Colonial Williamsburg used local sand for glassmaking. The glass produced had a pale green color. What does this tell you about the sand that was used?
It had iron impurities in it.
Use the internet or another source to find out what compounds are used in older traffic lights.
Red: Gold Chloride
Yellow: Iron oxide+ Cobalt Oxide+ Copper Oxide
Green: Chromium Oxide+ Cobalt Oxide+ Copper Oxide
Use the internet or another source to find the recipe for two different colors of glazes.
Purple: Gold Chloride+Cobalt Oxide+Copper Oxide
Orange: Gold Chloride+ Iron Oxide
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