The results indicate that the K/S values of the cotton, wool
and silk fabrics pre-mordanted with tamarind seed coat mordant
and dyed with natural dyes were higher than that of only
natural dyed cotton, wool and silk fabrics.The enhancement
in the depth of dyeing was due to the presence of tamarind seed
coat tannin acting as the mordant containing phenolic hydroxyl
group which forms a complex with the dye molecules and
leads to higher fixation of dye on the fabric.
Also, it can be
observed that the K/S values of all three naturally dyed fabrics
increased highly with subsequent mordanting with copper
sulphate mordant solution of 0.5% and 1% (owf) after tamarind
seed coat mordanting for both natural dyes.