Colour gamut of natural dyes on cotton yarns

Cotton fibres were dyed using various natural dyes alone and in combination to yield six basic shades: blue, yellow, red, black, green and fawn. These dyed fibres were then blended in various proportions along with undyed cotton fibres and spun on a rotor‐spinning machine to produce 204 coloured yarns. The fastness properties of the six basic shades were determined. The L*a*b* and L*C*h values of the yarns having 50% dyed fibre and 50% undyed cotton fibre was also determined. The values were plotted to obtain the colour gamut of natural dyes on cotton yarns.