Lattice Back Bracing

As I mentioned on the previous blog, I am using the lattice bracing for the sound board for my Nylon model. I also use the lattice bracing for my back. This time, I will use very thin back board thickness. Back thickness is 2mm for SSJ and 1.8mm for Nylon. When the back board thickness is very thin, ladder bracing stricture will be visible. This is a serious problem for loosing the beauty of back dooming shape.  However, thinner back board improves guitar's sound response. Earvin Somogyi mentioned this fact in his book, "Making the responsive guitar". I agree with his comments. To make thinnest possible back board thickness without sacrificing back dooming shape, I employed the lattice bracing for the back. First photo is for the nylon model. This is a gluing sequence using a vacuum clumping system. 2nd photo is the completed back for the nylon model. I was able to obtain very beautiful 12' radios without any distortion issue for the 1.8mm back thickness. Last photo is for the SSJ back. This is before gluing for the lattice. SSJ model uses Spanish ceder for the lattice bracing material.