Emodin and dermocybin natural anthraquinones as high-temperature disperse dyes for polyester and polyamide

Pure natural anthraquinones, emodin and dermocybin, isolated from the fungu s Dermocybe sanguinea, are for the first time used as disperse dyes for pol yester and polyamide fabrics using a high-temperature dyeing method, accomp anied with a reference dyeing with Cl Disperse Red 60. The color of each dy ed material is investigated in terms of the CIELAB L*, a*, and b* values, a nd color fastness to light, washing, and rubbing are tested according to th e ISO standards. Emodin dyes polyester bright yellow and dermocybin bright reddish-orange, and the fabrics show excellent color-fastness results. Emod in and dermocybin successfully dye polyamide brownish-orange and wine-red, respectively, but the fastness results are only moderate. This study shows that pure natural anthraquinone compounds can produce bright hues and color -fastness properties equivalent to those of synthetic disperse dyes, and th us providing useful alternatives to the synthetics.