Jorge Oliveira wrote: ↑
Tue Nov 14, 2017 3:25 pm
Hi Christian, that's me, Jorge. Please read this...
I apologise for quoting you, it is not proper nor polite
, but that's the expedite way to bring you and your expertise into this discussion. The question is how to distinguish between laminated
rosewood in the back and sides of a guitar, double plate rosewood and solid rosewood (or any other wood, for that matter).
, I believe, is a thin foil (2 or 3 mm) of rosewood glued to some other, thicker, non-precious type of wood. So the rosewood foil would just be there for aesthetic purposes. That would be the case of my Aria A558.
Then we have the double plate rosewood
, in which two thinner plates of rosewood would be glued and bent together to form the sides and back of the guitar. The luthier could even go to the extreme of matching the grain of these two plates, so that, at the naked eye, it could not be distinguished it from a single plate, solid, rosewood. Apparently, the factory of Ryoji Matsuoka did use this technique so as to make the instruments more resistant to the high humidity of Japan.
Finally, we have the well known solid plate rosewood
used in the sides and back of the guitar.
The question is, then, how can we distinguish between these three instances without "invading" the instrument. Moreover, why is a solid rosewood guitar more expensive than a double plate if, in the end, the amount of wood employed is the same (assuming, like many say, that the quality of the sound produced by both is indistinguishable)? Again, Christian, are we missing something?
This is complicated, sometimes laminated can mean just a kind of ply wood which is produced for musical instruments.
Laminated sides have a structural function an can help with more brittle wood, so it will not crack, and you can use thinner sides in this case, which will bend easier. On the other hand laminated sides have been used by many luthiers to give the sides more consistence, and some believe that the mass of sides has some influence on sustain, as the energy loss is less when the top is glued on a firm suport.
Also mass and flexibility of the back is critical and can add a very interessting element. Of course you can achieve all this also just using thicker sides and backs. I use a side bender and have bended rosewoode sides as thick as 3,5 mm on it. One can achieve very good results by laminating and you can't say that solid is better, it depends how it is done. A lot of world top luthiers use laminated backs and sides, and these guitars are not cheaper than all solid instruments.
This goes all into the discussion if light instruments are really better, I don't believe it, just diferent.