American Glass Guild Discussion Board Home
Home Search search Menu menu Not logged in - Login | Register

repair crack
 Moderated by: Rebecca
 New Topic   Reply   Printer Friendly 
 Rate Topic 
AuthorPost
 Posted: Tue Feb 14th, 2017 08:05 pm
   PM  Quote  Reply 
1st Post
shinnen
Non AGG Member
 

Joined: Sat Feb 11th, 2017
Location:  
Posts: 5
Status: 
Offline

  back to top

Hi,
       I've  had this bowl for quite a few years. How, and when, it got cracked, I don't know; but I would dearly like to repair the crack, or at least make it invisible. The design is painted on to the bottom. Any suggestions are appreciated. I have included a picture of the crack.
Thanks,
.... john

Attached Image (viewed 92 times):

crack in bowl.JPG



 Posted: Wed Feb 15th, 2017 02:42 pm
   PM  Quote  Reply 
2nd Post
Tod
AGG Member


Joined: Tue Oct 24th, 2006
Location: Monson, Massachusetts USA
Posts: 246
Status: 
Offline

  back to top

Look around close to home for someone who can help.

It's possible that a stained glass studio which is competent in restoration & conservation work can evaluate & even glue the crack for you.

You can also inquire at nearby museums which may have conservators who can either do the work or suggest local resources.

Last edited on Wed Feb 15th, 2017 02:43 pm by Tod



 Posted: Wed Feb 15th, 2017 08:01 pm
   PM  Quote  Reply 
3rd Post
shinnen
Non AGG Member
 

Joined: Sat Feb 11th, 2017
Location:  
Posts: 5
Status: 
Offline

  back to top

Hi Tod,
Thanks for the suggestions. I'm hoping that I can find a way of doing this myself.
.......john



 Posted: Wed Feb 15th, 2017 08:43 pm
   PM  Quote  Reply 
4th Post
Krueger
Senior Advisor
 

Joined: Sat Oct 7th, 2006
Location: Hartland, Michigan
Posts: 3201
Status: 
Offline

  back to top

Well, a thought......are you a glass person and do you have a kiln? If so, my thought would be to put the bowl in the kiln and then heat it up slowly.....but find out the spftening and/or melting point of something that thick.....and at the appropriate temperature, keep it there for ?? an hour? 90 minutes?? and then gradually cool it down, possibly over 24 hours....you might contact a hot glass person, as the bowl looks as if that is how it was constructed in the beginning.



 Posted: Wed Feb 15th, 2017 11:47 pm
   PM  Quote  Reply 
5th Post
shinnen
Non AGG Member
 

Joined: Sat Feb 11th, 2017
Location:  
Posts: 5
Status: 
Offline

  back to top

Hi Krueger,
Thanks for the suggestion. No, I'm afraid that I'm not a glass person. There probably are people, around here, who could do this, but my guess is that it would cost a lot of money. The bowl is about 18" across, and I'm guessing that a mold would have to be made prior to firing? Also, there is the problem of the pattern on the underside, which would have to be removed and reapplied (or redone) somehow.
Let me cut to the chase. I was hoping that it could be glued, perhaps with something like what is used for car windscreens. I have toyed with this idea, but my concern is that the glue would not penetrate into the crack and just stay on the surface, effectively not masking the crack at all.
..... john



 Posted: Thu Feb 16th, 2017 12:13 am
   PM  Quote  Reply 
6th Post
Mary Clerkin Higgins
Founder


Joined: Mon Oct 30th, 2006
Location: New York, New York USA
Posts: 498
Status: 
Offline

  back to top

Do NOT try to "melt the crack" together. That will not work. You'd have to heat it so hot it would be a puddle on the kiln floor before it melted together. It can be glued with a conservation epoxy like HXTAL. This is your own object, if you want to do it yourself you can get the epoxy at Talas Online. I think they even send some basic instructions with it - you can ask them. Or you can find a local objects conservator or stained glass studio with experience to do it for you.



 Posted: Thu Feb 16th, 2017 02:06 pm
   PM  Quote  Reply 
7th Post
shinnen
Non AGG Member
 

Joined: Sat Feb 11th, 2017
Location:  
Posts: 5
Status: 
Offline

  back to top

Hi Mary,
Thanks for the advice. I will give the epoxy a try. Is there any trick to getting the epoxy to go into the crack?
Thanks,
...... john



 Posted: Thu Feb 16th, 2017 04:44 pm
   PM  Quote  Reply 
8th Post
MattKolenda
AGG Member


Joined: Wed May 22nd, 2013
Location: Grand Rapids, Michigan USA
Posts: 11
Status: 
Offline

  back to top

HXTAL is not cheap, but definitely the way to go since it is very thin when freshly mixed. Through capillary action it will often easily penetrate a crack. There should be helpful instructions included that you'll want to study beforehand. I've had success applying the glue to the top surface and vacuuming from beneath to pull the glue in. It also helps if everything is nice and warm.

Good Luck!



 Posted: Thu Feb 16th, 2017 05:45 pm
   PM  Quote  Reply 
9th Post
shinnen
Non AGG Member
 

Joined: Sat Feb 11th, 2017
Location:  
Posts: 5
Status: 
Offline

  back to top

Hi Matt,
Thanks for the help. Yes, that's were my thinking is going at present. The crack is about 10" long, so I'm going to try attaching suction to one side and glue to the other. Is there a good solvent, or cleaner, that I can use to flush the crack with, just to be sure it's clean, before I start?
Thanks,
..... john



 Current time is 08:05 pm
Top




UltraBB 1.17 Copyright © 2007-2011 Data 1 Systems