Enhancing Polyphenols and Tannins Concentration on Cotton Dyed with Red Tea

Natural dyes, obtained from plants, insects/animals, and minerals, are renewable sustainable bioresource products with minimum environmental impact. However, there still many issues to solve related natural dyes; consequently, synthetic dyes wildly used. have a low affinity towards the substrate cotton, so solution had be found: mordants. Mordants can also harmful environment, which is why bio-mordants The mordant used in this paper chitosan. Cotton pre-mordanted using pad dyeing method. By exhaustion method, fabric was coloured red Camellia sinensis (tea) extracts. colour, absorption of polyphenols tannins, ultraviolet protection (UPF) were tested. A comparison study carried out between cotton padded chitosan at two different concentrations. results impressive. absorb more tannins than itself, colour fastness UPF, once laundered, demonstrate some kind bonding fibre, quitosan, active compounds tea. UPF doubled by reddish extracts darker on fabric. increase mordanted fabrics higher gap difference, means that do not confer but enhance protection.