Purple glass - nuking- sun exposure?

MiamiMaritime said:

I've seen tons of purple glass on eBay. Everyone seems to have something to say about "their" process and most say that "it is natural or close to natural sun exposed glass that they have seen. See the below from a current listing.

My questiona are:

what can and does happen with enough sunlight?
How do you tell if its natural color?
How long does it take?
Will my bottles in the window change color in a decade/lifetime?
How does "nuking" effect value and are all type of artificial colorings bad?

I'm interested in the above and figured it might spark some colorful input.


About this beautiful deep purple color ... this is a naturally occurring process with antique clear glass. Exposure to the ultra violet sun rays triggers a chemical reaction and the minerals oxidize and turn a wonderful lavender color. As a young person I had 100's of old bottles out on the roof of the house turning purple in the sun. I experimented with this purpling process for decades and found that it would take bottles like this a long time of exposure to the sunlight to turn this purple. So I came up with different ways to hasten this purpling process. For example, this item was run through an industrial food sterilizing process that simulates the ultra violet rays and rapidly enriches the purple color that would naturally occur if exposed to sun light for a prolonged period of time. The process produced the clearest, cleanest, and most natural purple color than any other method I've seen or tried. It is not irradiated (like the many other 'purple' bottles you see on eBay that are kind of a sick, washed out purple color) or radio active, just the richest and truest purple color. With few exceptions, only clear glass from before 1914 will turn sun-colored-amethyst. Not only does this deep purple/amethyst color make this a great looking bottle, but it also authenticates it as being truly antique, check it out!

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