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Author Topic: Identifying Blue glass..........Bristol, Cobalt, Irish?  (Read 4620 times)

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Offline catshome

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Identifying Blue glass..........Bristol, Cobalt, Irish?
« Reply #10 on: August 17, 2006, 06:35:38 PM »
So Bristol Blue and Cobalt are basically the same thing?  But if the pigment range is greenish blue to dark blue, does that include deep purple blue or should I be looking for something else to call it?

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Offline Lustrousstone

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Identifying Blue glass..........Bristol, Cobalt, Irish?
« Reply #11 on: August 17, 2006, 06:38:56 PM »
Blue :lol:  I don't know. I was just saying what Ivo says in his book. It's all very subjective really. Your blue is probably cobalt based, but the exact shade would depend on what else is in there

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Offline Pinkspoons

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Identifying Blue glass..........Bristol, Cobalt, Irish?
« Reply #12 on: August 17, 2006, 06:43:02 PM »
Quote from: "catshome"
...it looks more squat than I would have expected - is it distorted in the photograph?


No, it is that squat in real life. It's a tiny-tiny cream jug, about 2-inches tall.

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Offline catshome

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Identifying Blue glass..........Bristol, Cobalt, Irish?
« Reply #13 on: August 17, 2006, 06:46:19 PM »
Nic - I have to thank you I really needed a good laugh and that did it for me!  It looked like a pitcher................2 inches tall   :lol: Cat

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Offline Pinkspoons

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Identifying Blue glass..........Bristol, Cobalt, Irish?
« Reply #14 on: August 17, 2006, 06:51:21 PM »
I like that photo because it does make it look like a quite large and heavy pitcher at first glance... the paper label on the side is a bit of a give-away for its scale, though.  :lol:

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Offline catshome

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Identifying Blue glass..........Bristol, Cobalt, Irish?
« Reply #15 on: August 17, 2006, 06:53:14 PM »
only if you know how big the paper label is!

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Offline David E

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Identifying Blue glass..........Bristol, Cobalt, Irish?
« Reply #16 on: August 17, 2006, 07:04:32 PM »
I was under the impression Bristol had a certain amount of gold chloride included, whereas Cobalt didn't?

Cat, the site I gave you has changed. It used to give some fascinating detail on the origins of the colours Bristol Blue/Green and Ruby, but this seems to have disappeared :(
David
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Offline catshome

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Identifying Blue glass..........Bristol, Cobalt, Irish?
« Reply #17 on: August 17, 2006, 07:11:34 PM »
Hello David,

It was still interesting to me as I thought ALL Bristol Blue glass was old...............for some reason I thought they had stopped production of THE actual "Bristol Blue".

The technical stuff about the colour and content of the glass is also interesting but a little hard to apply without a chemistry set and perhaps a scanning electron microscope??

By the way...........I bought 2 pieces of REAL Chance glass today and I didn't even need to email you to check............all your training is paying off..............now hurry up with the book so we can all be millionaires!

Kind regards
Cat

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Offline Lustrousstone

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Identifying Blue glass..........Bristol, Cobalt, Irish?
« Reply #18 on: August 17, 2006, 07:21:53 PM »
I think perhaps you're right Cat. Hence the dates in Ivo's book. I also suspect it's evolved to become a colour. Modern Bristol Blue glass is just that. Blue glass made in Bristol

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