Patent ID: 7252687
Filing Date: 2007-08-07
Classification: C14C

Abstract:
1. A process for making wet-pink leather, said process comprising the steps of: i) treating pickled skins and/or hides in a bath comprising 0.5-3% w/w of one or more Tetrakis hydroxymethyl phosphonium salts and a 20-100% w/v aqueous solution of common salt at a pH in the range of 2.5 to 3.0 for 0.5 to 3 hours, and ii) further treating the skins and/or hides, as obtained in step(i), by adding 5-10% w/w of zirconium salt and 1-3% w/w of organic ligand to the bath, and treating said skins for a period of not less than 1 hour, followed by adjusting the pH of the bath to 4.8 to 5 to produce wet pink leather.