Abstract
Premordanting of jute fabric was carried out following single mordanting by biomordants (myrobolan and pomegranate) and ecofriendly chemical mordants (ferrous sulphate and potash alum) and double mordanting by sequential treatment of biomordant and ecofriendly chemical mordant. Extraction condition of natural dyes from manjistha, annatto, ratanjot and babool was standardised and applied on premordanted jute fabric. There is a substantial improvement of colour yield, levelness of dyeing and wash fastness properties of natural dyed jute fabric after double premordanting using bio and chemical mordant. Light fastness ratings are moderate to good while rubbing fastness are very good to excellent for all the natural dyed jute fabric. Very good ultraviolet (UV) protection ratings are achieved in case of dyeing of jute fabric using natural dyes extracted from manjistha, annatto, ratanjot and babool after premordanting with sequential treatment of biomordant and chemical mordant. UV protection properties of natural dyed jute fabric follows the order babool > annatto > manjistha > ratanjot.
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