Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Fri Mar 29, 2024 2:41 am


All times are UTC - 5 hours





Post new topic Reply to topic  [ 10 posts ] 
Author Message
PostPosted: Fri Sep 30, 2016 6:59 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Jul 10, 2009 4:44 am
Posts: 5398
First name: colin
Last Name: north
Country: Scotland.
Focus: Build
Status: Semi-pro
Maybe I'll get some joy here.
Someone brought one in, bridge 3/4 detached and a bit cupped
Looks like the bridge was glued to the finish, which is still sound (so far as I can see under the bridge - 1980's, polyester?)
Guesses as to the glue they used?

_________________
The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.


Top
 Profile  
 
PostPosted: Fri Sep 30, 2016 8:02 am 
Offline
Koa
Koa

Joined: Wed Feb 17, 2016 8:54 am
Posts: 854
State: Texas
Country: United States
Focus: Repair
My guess would be some sort of pva glue. Can you see if it melted the finish underneath or I is it mostly intact?


Top
 Profile  
 
PostPosted: Fri Sep 30, 2016 10:52 am 
Offline
Old Growth Brazilian Rosewood
Old Growth Brazilian Rosewood
User avatar

Joined: Fri Nov 02, 2007 9:49 am
Posts: 12971
Location: Ann Arbor, Michigan
First name: Hesh
Last Name: Breakstone
City: Ann Arbor
State: Michigan
Country: United States
Status: Professional
CA is often the glue used to glue directly to polyester. That's what Rick Turner used/uses.

_________________
Ann Arbor Guitars


Top
 Profile  
 
PostPosted: Fri Sep 30, 2016 8:54 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Thu Nov 04, 2010 1:46 pm
Posts: 2124
First name: Freeman
Last Name: Keller
Focus: Build
Status: Amateur
Whatever glue is on there now should be completely removed as should the finish. Once you have have good wood to wood then a wood working glue (HHG, Titebond) should work fine


Top
 Profile  
 
PostPosted: Sat Oct 01, 2016 2:14 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Jul 10, 2009 4:44 am
Posts: 5398
First name: colin
Last Name: north
Country: Scotland.
Focus: Build
Status: Semi-pro
Freeman wrote:
Whatever glue is on there now should be completely removed as should the finish. Once you have have good wood to wood then a wood working glue (HHG, Titebond) should work fine

I understand the sentiment, but this is probably a "pro bono" job (I used to own one) and would like to keep this in it's pristine original condition.
Besides, the top is best quality ply, and the finish may be helping holding it together. laughing6-hehe

_________________
The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.


Top
 Profile  
 
PostPosted: Sat Oct 01, 2016 10:43 am 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Thu Nov 04, 2010 1:46 pm
Posts: 2124
First name: Freeman
Last Name: Keller
Focus: Build
Status: Amateur
Colin North wrote:
Freeman wrote:
Whatever glue is on there now should be completely removed as should the finish. Once you have have good wood to wood then a wood working glue (HHG, Titebond) should work fine

I understand the sentiment, but this is probably a "pro bono" job (I used to own one) and would like to keep this in it's pristine original condition.
Besides, the top is best quality ply, and the finish may be helping holding it together. laughing6-hehe


I am a hobby repair person and probably the second most common repair I do is reglued bridges. I have a whole gallery of pictures of bad factory glue jobs - here is a Fender acoustic and yes, that is finish

Image

Paint stripper and a little chiseling

Image

This is what Fender thought was the right amount of glue

Image

This guitar isn't worth much, but if its worth fixing its worth fixing right.


Last edited by Freeman on Sun Oct 02, 2016 12:17 pm, edited 1 time in total.


These users thanked the author Freeman for the post: Colin North (Sat Oct 01, 2016 1:57 pm)
Top
 Profile  
 
PostPosted: Sat Oct 01, 2016 2:18 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Wed Oct 08, 2008 11:36 am
Posts: 7241
Location: Southeast US
City: Lenoir City
State: TN
Zip/Postal Code: 37772
Country: US
Focus: Repair
Freeman, couldn't agree more. Doesn't matter what type of guitar it is or how much it's worth, there is only one way to do a repair and that is the right way.

_________________
Steve Smith
"Music is what feelings sound like"



These users thanked the author SteveSmith for the post: Colin North (Sat Oct 01, 2016 5:34 pm)
Top
 Profile  
 
PostPosted: Fri Oct 14, 2016 3:45 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Jul 10, 2009 4:44 am
Posts: 5398
First name: colin
Last Name: north
Country: Scotland.
Focus: Build
Status: Semi-pro
No choice now I've got the bridge off.
Found the bridge was put on with a gob of clue in the front to middle of the bridge, and it lifted the finish off with it. What I was seeing was the finish behind the said gob at the rear.
About 1/4-3/8" clear of glue all the way from the wings around the back.
Fortunately, the varnish has only pulled up some tiny fibres of the top wood with it, and those are in the middle of the bridge area.

_________________
The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.


Top
 Profile  
 
PostPosted: Sat Oct 15, 2016 6:33 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Wed Oct 08, 2008 11:36 am
Posts: 7241
Location: Southeast US
City: Lenoir City
State: TN
Zip/Postal Code: 37772
Country: US
Focus: Repair
Looks like it came up pretty clean - nice! Can't believe that bridge held on when it was glued so poorly.

_________________
Steve Smith
"Music is what feelings sound like"


Top
 Profile  
 
PostPosted: Sat Oct 15, 2016 6:38 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Jul 10, 2009 4:44 am
Posts: 5398
First name: colin
Last Name: north
Country: Scotland.
Focus: Build
Status: Semi-pro
Lucky

_________________
The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 17 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com