when you put antique medicine bottles or old milk bottles out in the sun, they turn blue or lavender
2007-12-13 12:03:18 · 3 answers · asked by Richard E 1 in Home & Garden ➔ Decorating & Remodeling
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.
2007-12-13 12:59:25 · answer #1 · answered by Paul in San Diego 7 · 1⤊ 0⤋
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.
2007-12-13 23:17:38 · answer #2 · answered by Charles C 7 · 0⤊ 0⤋
look under and inside of stuff. old is always good.
2016-05-23 11:11:28 · answer #3 · answered by ? 3 · 0⤊ 0⤋