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Blue Pontil Black Glass

 
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Blue Pontil Black Glass - 5/17/2008 9:20:50 AM   
madpaddla


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Got this one in an auction.  I was impressed by the ponitl.
Thanks all.







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< Message edited by madpaddla -- 5/17/2008 9:23:06 AM >


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RE: Blue Pontil Black Glass - 5/17/2008 9:24:32 AM   
madpaddla


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Nice pontil




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RE: Blue Pontil Black Glass - 5/17/2008 9:26:21 AM   
madpaddla


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Whittle

Any ideas on age, origin, etc.  Thanks all
Madpaddla





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RE: Blue Pontil Black Glass - 5/17/2008 11:49:54 AM   
karis66


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Very Nice Bottle,I Pick 2 up at an auction  a couple weeks ago no idea what they are but they are sure pretty.  Congrats.   Kari

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RE: Blue Pontil Black Glass - 5/17/2008 12:30:21 PM   
madpaddla


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Thanks Kari:
Does the blue mean a presence of iron ?


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RE: Blue Pontil Black Glass - 5/17/2008 1:10:35 PM   
RedGinger

 

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That's a nice bottle, Madpaddla.  Good find!

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RE: Blue Pontil Black Glass - 5/17/2008 4:42:43 PM   
glass man


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I LOVE THE BOTTLE !I HOPE SOMEONE CAN EXPLAIN THE BLUE ALSO!

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RE: Blue Pontil Black Glass - 5/17/2008 5:04:36 PM   
annie44


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Very nice bottle!  There are different opinions about the blue color on the base of your bottle.  Here is a link to one explanation, with a couple of dissenting opinions!

http://www.antique-bottles.net/forum/m-13646/mpage-1/key-blue%252Cpontil/tm.htm#13666

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RE: Blue Pontil Black Glass - 5/18/2008 3:04:11 AM   
TROG

 

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The blue colour is caused from the refiring of the glass to smooth out a rough pontil

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RE: Blue Pontil Black Glass - 5/18/2008 12:24:13 PM   
buzzkutt033

 

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i think what the folks are asking is, is this an graphite or iron pontil that is refired?? does the mineral deposit from the pontil create the blue color? if not, what creates the blueish area in brown/green glass??

Jim

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RE: Blue Pontil Black Glass - 5/18/2008 12:49:49 PM   
kungfufighter

 

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At risk of restating myself I am of the strong opinion that "refired pontils" are an urban myth.  If the glassblower had the mechanical skills to hold the bottle while "refiring" the pontil why would he need a pontil rod in the first place?  The blue hue seen at the base of some black glass bottles (and at times seen on the bottle as a whole) is the result of the use of "glassgall" (a turquoise blue opaque sulphate salt of sodium) in the attachment of the pontil rod to the base.  It is most common in Belgian made bottles but also seen in English made bottles.  The blue hue can also be the result of the rueuse of blast furnace slag in the batch of glass.  Further info on the topic can be gleaned from Willy Van den Bossche's "Antique Glass Bottles."  

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RE: Blue Pontil Black Glass - 5/18/2008 1:41:42 PM   
madpaddla


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The idea of brought by Kung is very valid.  What would the need be?  And damaging the bottle would be a real risk.  With the time and more importantly the money of producing the bottle, why refire the pontil?  Either or I enjoy the piece and the discussion.  Thanks all.  Here is a different shot of the pontil in question.
Madpaddla





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RE: Blue Pontil Black Glass - 5/18/2008 1:53:23 PM   
madpaddla


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And lip. Is this American or English?  I was leaning toward UK but I just post bottles I find and know little of thier origin etc.
Thanks





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< Message edited by madpaddla -- 5/18/2008 1:54:14 PM >


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RE: Blue Pontil Black Glass - 5/18/2008 11:05:17 PM   
buzzkutt033

 

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thanx Jeff.  makes sense to me. after being away from the hobby at least 25 years, i'm finding the Internet a great great tool. back in the old days................  oh no !!


Jim

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Post #: 14
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