Abstract

A commercial scale trial of a previously proposed method of re-cycling of chrome-tanning liquors has been performed in which the spent liquor is used as a basis for preparation of the pickle liquor for the following pack of hides to be tanned. The method has been shown to be practicable for commercial operation and to produce leather of comparable quality to that produced by conventional chrome-tanning. In addition to assisting in the disposal of tannery effluent, the re-cycling method offers substantial savings in reagent costs.