Hi All,  Once mold has started to form in hide glue, it is useless.
The mold is eating the proteins that gives the glue its strength.

One way to delay the mold from forming is to refrigerate the glue after
it is made up.  What I do is make up a batch and then put it into 6-8
oz. plastic squeeze bottles.  Then I put them in the refrigerator.
They will last almost indefinitely.

When you're ready to use the glue, just immerse the bottle in hot water
(145-155 degrees) for a period of about ten minutes, or until the glue
is completely liquefied.  (Over-heating the glue will break down the
proteins.)

If you still have some glue left in the bottle after you're done, put
the bottle back in the refrigerator.  Mind you, every time you reheat
the glue it will lose some of its strength.

Craig Brougher has worked with hide glue for almost four decades and
he has perfected a product specifically designed for use in bellow
rebuilding.  The glue is only available through Player-Care com.  If
you are interested in buying this fine product, go to:

  http://www.player-care.com/resale.html#glue

If you are interested in learning more about the product, go to:

  http://www.player-care.com/brougher_hide_glue.html

Special Note: This product contains a mold inhibitor.

Musically,

John A. Tuttle
Brick, NJ, USA
http://www.player-care.com/
http://www.musicrolls.com/