Dyeing properties of henna as a natural dye on wool using microwave irradiation

In this work, microwave irradiation was used for dyeing the wool fibers with Henna as a natural dye. At first, mordanting treatment was carried out with some common mordants and washed thoroughly, then dyeing processes at different conditions (microwave irradiation and common dyeing methods) was performed. The influence of some parameters such as time microwave irradiation during dyeing processes and mordants type on the natural dye adsorption by wool fiber was studied. Also, the effect of time irradiation on extracted dye was considered. Results showed that the microwave irradiation was more effective than common method in dye up take and the dye adsorption was increased by increasing the irradiation time. In addition, better colorimetric characteristics, in terms of lightness and chroma, are obtained by applying Mw dying method.