DiGiorgio classical with de-laminating back

[thefishinmusician]

I have a Brazilian made DiGiorgio classical on the bench...It has multiple back " cracks " that are erupting across it...At first , I thought they were regular cracks , but on further inspection they are the top layer of the laminate peeling up..Rather large areas ( one is almost hand sized )...It's the kind of thing that makes you think of water damage , but there is more than zero evidence of it being water damage...I can easily make the " eruptions " go back down and mate up nicely...My basic plan is to inject with the proper thin glue...I'm hoping I can use titebond , thinned enough to flow where it needs to go....Any thoughts ?

[Taffy Evans]

Hi, my first thought was to work out a camping method, and cauls to match the back radius so that the laminations can be firmly held together whilst the glue is setting. 

Taff

[Palle Clausen]

Use Old Brown Glue. When heated up, it gets nearly water thin and can get in to all the tight places.

[thefishinmusician]

That's a new glue to me...Thanks !

[Greg Mirken]

It might be worth figuring out what glue was originally used for laminating. If you introduce a little water, you should be able to tell hide glue by smell. That would be the ideal case, because adding a little thinned hide glue will reactivate the original.

[thefishinmusician]

Can'tthink of a way to find that out.....Company no longer around...

[Greg Mirken]

I’d start in a small area; introduce a few drops of hot water with a syringe, squish it around a bit then clamp flat for a day. If the loose area stays down you’re dealing with hide glue.

[thefishinmusician]

Ahhhh.......( I can only smell cooking turkey, pot and Bacon....)...Although....Do you think anyone would use hide glue to laminate a plywood on an inexpensive guitar from Brazil ?....( My logic side here )...

[Taffy Evans]

Possibly made by a manufacturer of plywood company and the guitar builder.

Taff