Hydrogen peroxide is a satisfactory bleaching agent for various kinds of leather. A typical bleaching solution is 0.3 to 0.6% or 1 to 2 volumes hydrogen peroxide made slightly alkaline with tetrasodium pyrophosphate, sodium silicate, or ammonia. The operation should be carried out at a temperature as low as possible consistent with good bleaching and should not exceed 120'F. The time of bleaching should be as short as possible.
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