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Author Topic: glass decanter / jug age help please  (Read 1245 times)

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Offline Paul S.

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Re: glass decanter / jug age help please
« Reply #10 on: November 09, 2012, 03:16:05 PM »
perhaps it's the word 'depression' that's missing  -  just to differentiate between a flat ground base (which this is not), and the roughly circular concave effect that is created when the remains of the pontil attachment is ground/polished out.          Quality glass is often finished by breaking the attachment to the pontil rod, giving rise for the need to remove the scar by grinding and thus creating a 'depression'.      Much C18 glass, however, had a kick in the base (substantial indent) which hid the pontil scar (which remained permanently).


Offline Frank

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Re: glass decanter / jug age help please
« Reply #11 on: November 09, 2012, 05:45:23 PM »
All glass that is 'finished' would be ground first - this leaves a matt/satin finish. Polishing can restore it to full transparency and happens after grinding.

Firepolishing also restores to transparency but the surface remains irregular (with certain exceptions)
Frank A.
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Offline flying free

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Re: glass decanter / jug age help please
« Reply #12 on: November 09, 2012, 10:26:20 PM »
yes,sorry, I know that,  however to me when someone calls a base a ground base, I think of matt ground flat  bases such as occurs on e.g. some older Chinese glass vases or some studio glass.  I would have described that base as 'has a ground and polished pontil mark I suppose'.
m


Offline Frank

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Re: glass decanter / jug age help please
« Reply #13 on: November 09, 2012, 11:56:30 PM »
Yeah,  but be aware to grind a base 'flat' is usually done on a large horizontal abrasive disk, while a cheap solution for a large co, not so for a small operation where the grinder is likely to be vertical and smaller so that it can be used for more tasks.

Don know why I mention this... just popped into my head. Original comment aimed at Stew not M  ;)
Frank A.
Please help preserve glass web-sites for posterity by donating to The Glass Study Association a non-profit organisation.
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Offline stew2u2

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Re: glass decanter / jug age help please
« Reply #14 on: November 10, 2012, 12:22:14 PM »
thanks again for all the info
i love this site but the more i look at glass making the more i seem to get confused. timelines are my biggest headache to me this jug could be anywhere from 1800 to 1880 made in Europe  ???
there is always someone worse off .


Offline Paul S.

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Re: glass decanter / jug age help please
« Reply #15 on: November 10, 2012, 01:49:35 PM »
look at as much glass and from as many periods as you can Stew - and don't forget to keep reading the books  -  assume you have both the Hajdamach volumes. :)


Offline stew2u2

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Re: glass decanter / jug age help please
« Reply #16 on: November 10, 2012, 03:02:49 PM »
look at as much glass and from as many periods as you can Stew - and don't forget to keep reading the books  -  assume you have both the Hajdamach volumes. :)
i have a few books but not those they are now on the top of my xmas list thanks
stew
there is always someone worse off .


Offline Paul S.

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Re: glass decanter / jug age help please
« Reply #17 on: November 10, 2012, 03:30:50 PM »
Just don't try reading them in the bath, far too heavy - both should have been issued as 2 volume works.
I've just thought...........if you hit a bloke from the nobility, does that make him a belted earl. ;)


Offline stew2u2

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Re: glass decanter / jug age help please
« Reply #18 on: November 10, 2012, 08:25:00 PM »
just ordered the 1800 one from amazon 15 think thats cheap 40+ on ebay
there is always someone worse off .


Offline oldglassman

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Re: glass decanter / jug age help please
« Reply #19 on: November 15, 2012, 04:04:53 PM »
Hi,
          Had a root around and found this 1 of mine. A Light Baluster wine glass , Dutch engraved in the quality and manner of Jacob Sang Amsterdam c 1760 , A very similar coronet I think.

Cheers ,
               Peter.

 thought I would add the whole glass for those interested .  :)

 



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