deliming
The process of neutralizing the alkali, e.g.,
calcium hydroxide, used in liming and unhairing
hides and skins. Deliming, which usually takes
place in conjunction with BATING , is
accomplished by running the hides or skins in a
drum or paddle to which has been added water and a
proprietary compound consisting of a mixture of an
ammonium salt (preferably ammonium sulfate) and
proteolytic enzymes at a water temperature of 80
to 90° F. For more efficient control, and
to produce a particularly fine grain in the
leather, the ammonium sulfate (or boric acid), in
the amount necessary to neutralize the lime, is
added before the addition of the bating enzymes.
(291 , 363 )
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