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Glass Identification - Post here for all ID requests => Glass => Topic started by: bungie60 on October 20, 2008, 07:02:05 PM

Title: Green glass comemerative tankard George sixth, Davidson, Bagley. U.V reactive
Post by: bungie60 on October 20, 2008, 07:02:05 PM: I believe this might be a Davidson piece but i stand to be corrected. It does have a glow under UV but not as strong as other pieces i have.So i am inclined to think it is due to added manganese which i believe was used to make green. But testing other green pieces they don't glow as well as this. It is a half pint mug any info out there would be appreciated thanks in anticipation Mark. More photos here
http://glassgallery.yobunny.org.uk/displayimage.php?pos=-11001
Title: Re: Green glass comemerative tankard George sixth, Davidson, Bagley. U.V reactive
Post by: ChrisStewart on October 20, 2008, 09:10:19 PM: Hi,
It is not a Davidson piece. I think it is bySowerby.

Regards

Chris
Title: Re: Green glass comemerative tankard George sixth, Davidson, Bagley. U.V reactiv
Post by: jsmeasell on October 20, 2008, 09:33:13 PM: This mug is pictured in the book by Walker and Biss (p. 94 in the middle at the bottom of the page), but they do not indicate the colors in which it is known. My wife and I have the same mug in amber, and the round area containing the portraits is nicely frosted by acid etch.
Title: Re: Green glass comemerative tankard George sixth, Davidson, Bagley. U.V reactive
Post by: bungie60 on October 20, 2008, 09:49:19 PM: Thanks for that one and all just had a search and found this George V by Sowerby very similar. Why i did not think to put in sowerby before i will never know
http://www.belowstairs.co.uk/acatalog/Online_Catalogue_Commemorative_80.html
Title: Re: Green glass comemerative tankard George sixth, Davidson, Bagley. U.V reactive
Post by: Adam on October 21, 2008, 08:43:56 PM: That colour looks like chromium, probably with some iron and maybe a little uranium. Certainly no manganese, which gives violet or purple.

Adam D.
Title: Re: Green glass commemorative tankard George sixth, Davidson, Bagley. U.V reactive
Post by: bungie60 on October 21, 2008, 10:48:46 PM: That explains it then Adam compered with my other pieces of green, i can now see the difference. As i say you never stop learning and that now is another piece in the jigsaw.Thanks for your time
Title: Re: Green glass comemerative tankard George sixth, Davidson, Bagley. U.V reactive
Post by: krsilber on October 22, 2008, 09:37:28 PM: Quote from: Adam on October 21, 2008, 08:43:56 PM
That colour looks like chromium, probably with some iron and maybe a little uranium. Certainly no manganese, which gives violet or purple.

Adam D.

Would it glow without the uranium? Does chromium fluoresce?

I have actually seen formulas for greens that contained manganese in small amounts, presumably to counteract the color imparted by iron even though that's often a green as well (maybe the sand they were working with had a high enough iron content to turn it brownish, I don't know). In any case, I doubt it would be enough to make a green piece fluoresce obviously.
Title: Re: Green glass comemerative tankard George sixth, Davidson, Bagley. U.V reactive
Post by: Adam on October 23, 2008, 08:27:37 PM: Sorry, Kristi, I am no expert on fluorescence - there are contributors to this board who know far more than me. In "my" day it was never an issue, perhaps because at that time there was no uranium available to buy. OK, before someone reminds me, I did say that at Davidsons I inherited a small bag of uranium oxide. It was still there when I left. I never played with it for the simple reason that, no matter how wonderful the results we could never have made use of them commercially - no supplies.

Adam D.
Title: Re: Green glass comemerative tankard George sixth, Davidson, Bagley. U.V reactive
Post by: krsilber on October 23, 2008, 09:34:11 PM: Makes a great story, anyway! Not many people can say they've inherited a bag of uranium.