Ep. 88: Let's talk about GLUE!
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- Опубліковано 3 сер 2024
- Glue is an important issue, such as all the other choice of every material used on violin viola cello and doublebass. Musicians want that everything stays exactly as it is forever. But instruments are made out of wood, and wood is a material which is adapting to every climate change and is therefore moving more than we want. This movement is mainly sideways, and the length of every fiber of the wood stays quite the same. This causes problems and sooner or later the glues areas are opening up. If it would not open up, the wood would crack, and this we absolutely want to avoid. That's the reason most areas need to be glued with animal glue, which is a reversible glue which can be opened restored and glued as often as we want.
It apparently seems a paradox that expensive instruments need to be glued all the time, but is actually the guarantee that nothing breaks as it happens frequently on more economic instruments where factories make everything to glue with the strongest glue they can find to sort out for the first years this sometimes disturbing issue.
So calm down and be happy that your instrument need s to be glued only.
Not crack repaired.
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Thanks Edgar for mentioning Titebond Original as a means to glue the ribs to the blocks. A well known luthier wrote years ago in the Guild of American Luthiers how he used Titebond for this purpose and I had wondered if this was an acceptable method. Your explanation satisfied my curiosity.
great information, your a wealth of knowledge, but always looking for new ideas.
This video is so helpful - thank you!
Informative video Edgar, thank you. PLEASE wear a microphone or use a mic that is close to you as you speak, the echoes and reverb from recordings like this one are hard to listen to/understand...
Titebond Original is reversible. Used a LOT in guitar making.
Titebond II (blue one) is water resistant and is not reversible.
Also, Titebond Original is an aliphatic resin. White glues, like the Pattex you show, are PVA glues (Polyvinyl acetate).
I use Titebond Original for guitar making, but also hot hide glue that I'm really starting to like ! The fact that it drags the pieces together when drying is super useful for gluing guitar bindings. It fills every little gap.
@Edgar, so a layer of this glue (deluted)on the top? doesn't it become hard? meaning that it would harden the wood and thus make the wood less flexible?
Thanks Edgar for this new video. One question only: if i change the relation “ water/ animal glue” , the strength of the hide glue would change? Do i have to prepare different concentrations depending on what i have to glue? Thanks again.
I believe adding water will mostly affect the consistency and drying time, not the strength.
There are differences in glue strength (called gram strength), e.g. between bone glue and hide glue but also within those there are variations. For more information, the book "Hide Glue" by Stephen A. Shepherd, Full Chisel Press (ecwid.com) has a lot of information, albeit sometimes being a bit unstructured.
Edgar I have a question about the effects tuning a violin with steel strings up a semi tone from concert pitch to E flat has on the bridge. This is common practice in Irish traditional music.
Erster!
I have here a bottle of Contura "Original Kanadischer Fischleim" (Original Canadian Fishbladder glue) here. Very good for repairs. Cracks open easily if necessary.
Thanks for your comment!
Fish glue is very good and reversible!
Top!
👌🏼
All the best from Cremona
ER