Richard E posted:
when you put antique medicine bottles or old milk bottles out in the sun, they turn blue or lavender
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Richard E posted:
when you put antique medicine bottles or old milk bottles out in the sun, they turn blue or lavender
It’s the trace elements they used in making the glass that’s oxidizing. For example, copper oxidizes to a bluish-green color. So, if there were trace amounts of copper in the glass when they made it, it will turn over time to a bluish-green tint.
Paul gave a good answer. Hard to believe but may metals dissolve easily in glass and are added to color it. Copper, Cobalt and many others are used. If you put them under a Blacklight they often glow, sometimes with a different color than the glass appears in white light.
I was looking for more information on what makes antique glass turn blue ? | Antique Bottles and Bottle Collecting on Bing and this address was the first site I saw about it. Thanks for this and now I know where to discover cool stuff in the future