Institute for Color Science and Technology (ICST) Progress in Color, Colorants and Coatings 2008-2134 7 2 2013 05 04 Investigation into the Dyeing of Soybean Fibres with Natural Dyes and their antimicrobial properties 95 104 75827 10.30509/pccc.2013.75827 EN R. Jafari Department of Color Physics, Institute for Color Science and Technology H. Izadan Department of Textile Engineering, Isfahan University of Technology A. Khodami Department of Textile Engineering, Isfahan University of Technology M. Zarrebini Department of Textile Engineering, Isfahan University of Technology Journal Article 2012 12 25 The dyeing behaviour of annually renewable soybean protein fibres with Madder, Weld and Walnut seed husk, natural dyes, were investigated and their possible antimicrobial effects were evaluated. The results obtained from the dyeing of the Madder on the soybean fabric were compared with those on a wool fabric. It was shown that the amount of the amino acid content of the fibre has a great effect on the final colour depth. The unusual change in the colour of the Madder on the soybean fabric upon washing in an alkaline washing solution is also addressed. Also, a good antimicrobial activity against the gram-positive bacterium for the Walnut husk and Madder dyes were revealed while the effect of Weld dye was practically negligible. However, these natural dyes on the soybean fabric did not show any significant antibacterial properties against gram-negative bacterium. https://pccc.icrc.ac.ir/article_75827_249e81b494cd3f0e3bbe8f3004be9606.pdf