Here is the days progress
|air dry for about one hour.
||With a damp wool sock,
wipe down the entire back side of the assembly
|fold up the assembly and place
it in a clamping jig over night. This gives the small amount of
moisture in the assembly time to spread to all the layers
|Next morning put the bellows
into a sturdy clamping jig and with all your might tighten four large
handscrews and four C clamps. Every ten minutes, screw them down
again. Do this four times
|| You will find the bellows
will compress into a very tight bundle. I advise you here to
remove the clamps and pull the bellows out of the jig.
Stretch the bellows out.....see that you have not used too much glue
and are gluing the whole assemble together!!.
When you are satisfied that the folds are free, replace the bellows in
the clamping jig and leave them for one hour.
Measuring the Bellows
This took me a good while to learn (no teacher!) If you follow these instructions, you can make bellows of any number of sides and for any diameter concertina. I will show the method for a six sided instrument.
With a dividers, measure the exact distance from one inside corner to the next.
Look carefully at the construction of my bellows frame. You will see a 1/8" rabbet cut into the frame. This rabbet will hold and center the bellows into the frame (well, in a few minutes it will)
Oh, and now you can remove the bellows from the clamping jig. The next part is very clever, I hope you think so as well.