Abstract:
To determine color change or color fastness, a sample of vegetable-tanned leather is subjected to soaking in an alkaline sweat solution to remove excess tannin and other non-tannins, which have a strong antimicrobial effect due to their large amount in the structure of the leather and make post-treatment unnecessary. Before and after the wetting process, the samples were analyzed with a remission spectrophotometer to determine the color change by objectively measuring the color parameters of the dye and the total color difference. The efficacy of treatment with environmental friendly plasma and biopolymer chitosan was confirmed in some samples by microbiological analysis against two bacterial species - Staphylococcus aureus and Klebsiella pneumoniae - using a qualitative diffusion test.
