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Author Topic: Bagley "Whitby"  (Read 488 times)

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Offline theElench

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Bagley "Whitby"
« on: February 05, 2018, 11:41:41 AM »
A picture of my short candlesticks from the "Whitby" set in clear blue.  All the pictures on the file are green so please add if you want to.  These also glow green under UV, not strongly enough for me to take a photo that shows the effect with my rather basic camera.  If "Uranium blue" is of interest is there a way I could strengthen the glow or enhance the picture to show it better?

Hope this is of use , Dave. 

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Offline Lustrousstone

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Re: Bagley "Whitby"
« Reply #1 on: February 05, 2018, 12:10:34 PM »
It's not uranium blue: a weak glow is manganese decoloriser, which is often found in coloured as well as clear glass.

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Offline theElench

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Re: Bagley "Whitby"
« Reply #2 on: February 06, 2018, 06:33:31 AM »
Thankyou for that, I thought a weak glow just meant there was less Uranium.

Decolouriser is like bleach for glass?  To make it clear before adding a colour, so everything made from it comes out the same shade?

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Offline Lustrousstone

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Re: Bagley "Whitby"
« Reply #3 on: February 06, 2018, 07:36:49 AM »
A lot of the sand (except the very expensive sand) used in glass making contains small quantities of iron, which causes a greenish colour in the glass (think old-fashioned coke bottles). Adding manganese is one way of getting rid of this green tint

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Offline theElench

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Re: Bagley "Whitby"
« Reply #4 on: February 08, 2018, 12:20:25 PM »
I hope you don't mind if I ask another question about glass that glows.  I have a couple of Davidson bowls that have a soft yellow glow under UV light.  Would this again be a decolouriser, but not Manganese?

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Offline Lustrousstone

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Re: Bagley "Whitby"
« Reply #5 on: February 08, 2018, 01:07:35 PM »
Depends what colour glass they are

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Offline theElench

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Re: Bagley "Whitby"
« Reply #6 on: February 08, 2018, 07:56:02 PM »
They're both green.

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Offline Lustrousstone

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Re: Bagley "Whitby"
« Reply #7 on: February 09, 2018, 01:15:40 PM »
It's probably manganese again

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Offline theElench

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Re: Bagley "Whitby"
« Reply #8 on: February 12, 2018, 08:59:43 AM »
Thank-you for the info.
I used to have an article about uranium glass that I could refer to but when I moved stuff to the new one somehow I managed to forget it.  Now, of course I can't find it again to save.

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