A Note on the Dyeing of Wool Fabrics Using Natural Dyes Extracted from Rotten Wood-Inhabiting Fungi
Biotechnology Center, Universidad de Concepción, Concepción 4030000, Chile
School of Science and Technology, Universidad de Concepción, Campus Los Ángeles, Los Ángeles 4440000, Chile
Author to whom correspondence should be addressed.
Coatings 2018, 8(2), 77; https://doi.org/10.3390/coatings8020077
Received: 14 December 2017 / Revised: 7 February 2018 / Accepted: 14 February 2018 / Published: 19 February 2018
(This article belongs to the Special Issue Binders, Pigments, Dyes and Additives)
Fungal isolates obtained from rotten wood samples were identified and selected by their ability to produce fungal dyes in liquid media. Fungal isolates produced natural extracellular dyes with colors ranging from red to orange, yellow and purple. Dyes from two of these fungi, Talaromyces australis (red) and Penicillium murcianum (yellow), were extracted and used to dye wool samples in a Data Color Ahiba IR Pro-Trade (model Top Speed II) machine. The protein nature of wool interacted well with the fungal dyes producing colors suitable for textile applications when used to a concentration of 0.1 g·L−1. Results on color fastness when washing confirmed the affinity of the dyes with wool as the dyed samples kept their color in acceptable ranges after washing, without the implementation of mordanting pretreatments or the use of fixing agents.