| ▼Here is a blue inexpensive blue cello with the worst crack. If it was a decent instrument you would use the following steps: - take the top or back off
- make a mold
- Glue the crack together
- carve out the area for the patch
- Chalk fit the patch
- Glue the patch in
- Make the patch the same thickness as the back
- Cleat the rest of the crack
- Thin the cleats
- Glue the top or back onto the ribs
- Seal the outside of the crack
For this cello I would not do all that work, but I did want to entertain myself and see if I could fix it without all those steps.It was buldging out quite a bit, so I needed to get it back to a normal curvature. I needed to clamp it to somthing, These are the steps: - Make a clamping jig that is suspended just over the top and is clamped onto the ribs.
- Then make a clear plastic mold.
- Glue and clamp the crack.
- After a couple of days when I had time, I made a little oval reenforcement that the sound post would sit on.
- To glue that in I made a smaller plastic mold then while the oval piece was still wet I used a couple of drops of glue to hold it onto the plastic mold.
- Put glue on the oval piece and dropped it into the cello.
- Then moved it into place
- I used an adjustable soundpost jack to hold it down.
- The next day I popped the plastic clamping piece off the oval.
- Then when t was all finished, just a little clear touchup on the crack to seal it.
Pictures of the steps are shown below. |
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