Study on the color characteristics and fastness properties of dyed wool yarn with some yellow natural colorants

There are several natural yellow colorant dyes such as Reseda, Vitis vinifera, Prangos ferulacea, Turmeric, Saffron, Sumac, Onion skin, Eucalyptus, Safflower, Chamomile, Tagetes and many other flowers in nature that can be used to obtain yellow color with different degrees on textile fibers. In this study, 10 common natural yellow colorants were used for natural dyeing of wool yarn. In order to this, the wool yarns were treated with three different concentrations of Tin (II) chloride (1, 2, 3 wt%) and then dyed with different percentages of selected natural colorants (10%, 30% and 60%) in the presence of acetic acid. The reflection spectra of the dyed samples were examined and the color strength of them was calculated based on the visible region. Due to the color strength of the dyed samples, it can be concluded that the Onion skin colorant and Sumac have the highest and lowest color strength, respectively. The dyed samples with Reseda, Prangos ferulacea, and Turmeric presented a lower light fastness in the presence of tin chloride compared to the other dyed samples.