Natural Dyes in Combination: Dual Dyeing for Newer Shades by Varying Pre-treatments, Mordants and Type of Natural Dyes
Tóm tắt
In this study, three different dyes, i.e., Punica granatum, Terminalia arjuna and Acacia catechu were used in combination with natural indigo dye. Pure cotton and pure silk mordanted swatches were first dyed by above three dyes and then re-dyed by indigo through vat method which gave beautiful shades of bluish green and shining dark green. It has also been observed that pre-mordanting with five different inorganic salts produced different shades after indigo dyeing. CIE La*b* and K/S values shown excellent reflectance on fabric. The light and washing fastness of the dyed samples were also evaluated, giving fair to excellent fastness grades especially the wash fastness after indigo dyeing gave very good results. It has been observed that combination of Punica, Acacia and Terminalia with Indigo has produced a diverse array of shades different from their intrinsic shades on both the fabric. Dyed fabric has shown substantial increase in color depth (K/S) and wash, light and rubbing fastness after indigo dyeing. The collection of shades and fastness grades may be useful for textile dyeing industry for cotton and silk fabrics.
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