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Glass Identification - Post here for all ID requests => Glass => Unresolved Glass Queries => Topic started by: jonchellycain on June 29, 2009, 10:05:38 PM

Title: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: jonchellycain on June 29, 2009, 10:05:38 PM
Hi there
picked this ashtray up at the weekend, with the thoughts it was very similar to jurnikl's ashtrays. But to my surprise whilst checking something else with the UV light i noticed this little fella glowing in the background all be it not not the normal bright green but still green and bright but more milky yellow green if that makes sense..
The ashtray has 4 sides (not a square though) as it has a wavy line so almost facet like.. with a wavy rim which is roughly 1.5cms deep. The base is welled but more rounded than most czech pieces ive seen. 14cms across, 4.5cms tall
The colour is very similar if not the same as czech glass the beautiful electric blue (which is my fav of the colours)
Apoligise for the bad pics especially the UV one was trying to hold camera and UV light, which is about 25 inch long, at the same time
any ideas??
many thanks
michelle
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: Anne on June 29, 2009, 10:13:02 PM
I think this is what Christine means when she refers to a manganese glow...?
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: jonchellycain on June 29, 2009, 10:19:39 PM
she said something like that on another item i had but i thought that generally didnt glow very brightly, whereas this all be a slightly bluey colour does glow quite bright.. i thought maybe because of the colour of the glass this was why it was a differnt shade??
thanks
michelle
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: Anne on June 29, 2009, 10:20:55 PM
You could be right Michelle. I'm sure Christine will tell us when she lands here next. 8)
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: jonchellycain on June 29, 2009, 10:33:13 PM
It doesnt happen very often :24: I will have to try the UV on the sklo pieces in the same colour see if they glow too.
michelle
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: Lustrousstone on June 30, 2009, 05:29:46 AM
Anne's been listening to me toooo long  ;)

Yes, I think it's manganese. Blue uranium is rare, but it too glows bright green. When you take it outside when it's bright but not blazing sun you should also catch a hint of green on the edges.

This lovely lady glows bright green, but I can't get a UV picture without messing
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: Anne on June 30, 2009, 04:23:16 PM
Ohhhhh good, I'm learning Christine! :24:   Actually I've been hoping someone would post a pic of a manganese glow for a while as I've never been sure just how bright it is (or isn't!) I suspect a couple of my not too bright glowing bits might be manganese rather than uranium! ::)
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: jonchellycain on June 30, 2009, 05:07:38 PM
gonna sound a bit daft now can you sound it out is in man-ga-nese or mang (as in the pea) a- nese (as in knees)   :24:
michelle
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: Anne on June 30, 2009, 05:25:52 PM
Man-Ga-Knees (the G is a hard one Michelle). 8) 

BTW if you're into pronunciations, check out our How Do You Say That? page here, compiled by folks here on the board: http://glasspeak.yobunny.org.uk/ :thup:
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: jonchellycain on June 30, 2009, 06:03:25 PM
I have a peek before, im always unsure of sklo as some say skylow others say skeelow any ideas on the correct way
thanks michelle
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: Lustrousstone on June 30, 2009, 06:17:24 PM
Quote
milky yellow green
that's the tell tale bit. You never need to go in the dark to see the uranium glow, although you might need to get out of the sun, and you can generally wave your torch around from at least a foot away and get a reaction (depends a little on the lighting conditions). I don't always get it right.

Manganese was often used to decolorise glass. Silica sand often contains iron, which turns glass coke-bottle green; adding manganese turned it clear. Try your torch on some old clear drinking glasses. Quite why it pops up in amber and green glass (don't know if it's found in blue or pink, don't often pick that up), I don't know. It's probably something to do with adding your colorants to your standard clear mix or maybe they got better shades if they got rid of the iron green. Glass recipes were often very traditional.

Manganese fell out of favour when cheaper alternatives became available. Like uranium, it's never been cheap.

Used on its own in high concentrations, it gives a lovely purple. It is also what causes clear old glass to sun purple, or more likely sun grey here in the UK. The sun changes the chemical composition of the manganese compound to give a purple one.
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: jonchellycain on June 30, 2009, 06:47:24 PM
wow thanks for that christine, i will try to remeber in the future but im sure i will be running things past you lol
michelle
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: Anne on June 30, 2009, 09:42:05 PM
Marcus says it as SKLO as in rhyming with slow and he should know! (Bad poetry already!!! :24:)
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: jonchellycain on July 16, 2009, 02:03:35 PM
so anybody any ideas on who its by or even which part of the world i should start looking, as i said my first instinct (not that there worth much :24:) is czech anybody agree/disagree
cheers michelle
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: flying free on December 16, 2009, 08:13:49 PM
Hi

whilst searching for uranion Sklo union glass I came across this post.  Michelle I have the same bowl but in a dusky grey/dark blue, it also glows but it is a different hazy 'thick' glow compared to my other Sklo Union pieces all of which glow from a distance away from the blacklight and much brighter green although still not a 'clear 'green. I have a Schrotter lens vase (bright blue), a hobnail bowl (dark green) and also a Matura ashtray (again bright blue) which all glow REALLY brightly.

Christine, could this mean they are uranium or could they too be a result of manganese?

many thanks
m
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: Lustrousstone on December 17, 2009, 07:17:53 AM
I doubt that it's uranium. It's rare in blue and was probably too expensive for Communist times
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: flying free on December 20, 2009, 01:36:14 AM
Thank you Christine  :)
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: CultureVulture on August 28, 2011, 11:04:03 PM
so any more conclusion as to the makers?
Title: Re: ashtray, electric blue uranium czech?? similar to jurnikl
Post by: JohnM on October 08, 2017, 08:15:31 PM
Jan Sylwester Drost ? Zabkowice

https://desa.pl/pl/auctions/342/object/34199/jan-sylwester-drost-popielniczka