List,
I use a damp cloth and a steam iron to free old ivory from the keystick.Then leave the pieces in very hot water for a few minutes , replenish with more hot water as needed and usually after a few minutes the old glue
and whatever residue remains will slide off.
A few suggestions were made about drying the ivory to keep it from warping-curling . Clamping , weighting down , flipping the pieces over etc .
I just lean the piece at the back of the bench or on a shelf as pictured here. The ivory dries perfectly flat when the air surrounds both sides . Stack em' up and go away.
Just my take,
Tom D.
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