Old Purple Bottles

Have you seen old purple bottles before?

Gorgeous aren't they?

Ever wondered why they are purple?

You may remember in my last post about old bottles that I would explain the reason why some old clear bottles can turn a shade of purple over time.

Well there is a simple reason and it all has to do with manganese, an element that was used in the making of the clear bottles or glass during that time. It was discovered later that over time and under ultraviolet light, the manganese combines with the oxides in the glass causing the glass to turn a light pink, then a lavender colour to a moderately dark amethyst or purple depending on the amount of manganese and amount of ultraviolet light. 

As a result, these bottles are commonly called 'sun-purpled' or 'sun colour amethyst' glass. 
 Beautiful aren't they? 

So if you have some old clear bottles, pop them out in the sun for a few months and see if they turn or if you have an old glass fishing float, it may change colour too. 

As seen here, the float on the left has been left out in the sun for a few months and as you can see is starting to change colour. The one on the right was left inside.

And this is a French float that has been left out in the garden. It has turned a brilliant colour purple. Simply gorgeous isn't it?

I hope you've enjoy learning all about purple bottles & floats as much as I did when I discovered this phenomenon.

If you are interested in purple bottles, the bottles in this post and others are available. Simply click this link:

*Thanks to J.L McKilligan & Tom Rizzo for sharing your photos of the glass floats
** Source of information about how this phenomenon occurs came from www.bottleantique.com


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