> Third, use a clothes iron and heat the ivory until it slips off.
> (Remember, I mentioned that the mixture got warm as it was setting.)
> Naturally, the heating technique can scorch and discolor the bone ivory.

In response to John Tuttle's comments above on repairing ivory keytops,
certainly the clothes iron can be a useful tool for this job, but in
order to avoid any scorching or discoloration of the ivory, then simply
transmit the heat through parcel grade brown paper.  This works a treat
and the same method can be used for re-laying lifted wood veneers without
damage.

On the question of wood, a quicker and better contact is obtained if
you are able to get a fine spray of water under prior.  The iron heats
this and the original glue into something like it should be sharp time
and seems to lay down easily.  For bubbles in wood veneers a little
water or weak 'Unibond' mix can be injected through with a hypodermic.
But don't forget your brown paper.

Regards to all,
Mark Singleton