brightening agents
Chemical agents at one time used extensively in
leather dye batches to brighten the color of the
finished leather. One such agent was sulfuric
acid, which is not only destructive but virtually
impossible to remove from leather effectively and
completely. Another was formic acid, which, being
weaker and more volatile, was less destructive.
See also: P.I.R.A.
TESTED . (298 )
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