THE EFFECT OF VALONEA AND HENNA TREATMENT AND POST-MORDANTING ON CR (VI) AND FREE FORMALDEHYDE FORMATION IN LEATHER
Articles > Article · 2016
Authors: Hasan ÖZGÜNAY, Onur YILMAZ, Urana DANDAR, SELİME ÇOLAK, Gökhan ZENGİN, ALTAN AFŞAR, Demetra Sımıon, Carmen Gaıdau
TEKSTIL VE KONFEKSIYON, Journal Indexed in SCI Expanded, International, 2016, vol 26, pp 327-334
Summary
Present study aims the use of natural vegetable tannins as antioxidant phenolic materials in the processing of chromium tanned leathers and to investigate their effect on Cr(VI) and free formaldehyde formation. For this purpose valonea and henna were selected as tannins and their antioxidant capacities were determined by FRAP and TEAC/ABTS methods. These vegetable tannins were used in retanning process of chromium leathers in combination with copper, aluminium and iron based mordants to evaluate their potential on reduction of Cr(VI) and formaldehyde content of the leathers as well as their effect on colour tones.