METHOD FOR LIMING HIDES AND SKINS

摘要

PURPOSE: Provided is a method for liming skins and hides by using proteolytic enzymes in an aqueous alkaline float, by which very soft hides and skins are obtained and nubucking and grain opening are significantly reduced. CONSTITUTION: The method for liming skins and hides comprises using proteolytic enzymes in an aqueous alkaline float. The liming float has a pH of 10 to 14 and contains both thiourea dioxide and alkaline proteases having elastase activity. Particularly, the float contains 0.3 to 2 wt% of thiourea dioxide based on the weight of the hides and skins to be treated. The alkaline proteases are bacterial proteases including proteases obtained from Bacillus alcalophilus.