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Glass Identification - Post here for all ID requests => Glass => Topic started by: ejean9 on July 20, 2010, 07:47:59 PM

Title: What does a coachbolt pontil
Post by: ejean9 on July 20, 2010, 07:47:59 PM

look like..please ? I have never seen one to my knowledge..and cant find any clear photos.
Jean

Title: Re: What does a coachbolt pontil
Post by: chilternhills on July 20, 2010, 09:03:18 PM

Hi Jean,

I have a couple of Isle of Wight Studio Glass pieces with a coachbolt pontil. These were made for a short period in 1973 only. I'll see what I can do about pictures in the next few days.

Anton

Title: Re: What does a coachbolt pontil
Post by: ejean9 on July 20, 2010, 09:17:21 PM

Hi Anton

Thank you very much..
Jean

Title: Re: What does a coachbolt pontil
Post by: glassobsessed on July 20, 2010, 09:42:21 PM

First photo coachbolt pontil mark used 1973 only, second photo flame pontil mark used 1974 - c1982, both Isle of Wight Studio Glass. Dates from Mark Hill's book on Mdina and IoWSG.

John

Title: Re: What does a coachbolt pontil
Post by: ejean9 on July 20, 2010, 09:56:19 PM

Hi John
Thank you..it is probably just my eyesight, but i can not for the life of me make out the coachbolt one..i managed to find a photo on the web..i could not make that out iether..i think im getting old !  :'(

Title: Re: What does a coachbolt pontil
Post by: glassobsessed on July 20, 2010, 11:18:57 PM

There is not a lot to make out, it's just a concave blob of glass that was shaped with a rounded bit of metal while it was still hot.  ;)

John

Title: Re: What does a coachbolt pontil
Post by: chopin-liszt on July 21, 2010, 09:23:32 AM

It was made, quite literally, with a coachbolt. There happened, at the time, to be one handy. The round top of the bolt was pressed into the blob of glass put over the pontil scar. It leaves a round outside ridge with a round crater inside. The coachbolt pontil mark.

(the pontil is the metal rod the glass is held on while being worked, when it is broken off, it leaves a MARK. The pontil mark or pontil scar.)

(nag, nag, nag!)  :wsh:

Title: Re: What does a coachbolt pontil
Post by: ejean9 on July 21, 2010, 09:39:55 AM

Thank you folks..there was me looking for something startling..at least now i know !