Abstract: Pomegranate (Punica grantum) rind powder was used as natural colourant for dyeing using gamma irradiated and un-irradiated cotton fabric .Both the powder and the fabric were irradiated to different gamma ray absorbed doses using Co-60 gamma irradiator in order to observe the effect of radiation treatment on the colour strength of dyed fabrics. The data colour report was used for the evaluation of un-irradiated and irradiated dyed cotton using spectra Flash SF- 650 in CIE Lab system. Pre and post-mordanting was also carried out using chrome alum, ferrous sulphate, copper sulphate, and stannous chloride as mordants. It was found that gamma irradiation has a potential to improve the fastness properties as well as colour strength of irradiated fabric using pomegranate rind powder as a source of natural dye.