Abstract:
River water containing different types of metals
and heavy metals are far more efficient in promoting sur face colour strength and all round colourfastness properties
of silk fabrics when dyed with aqueous extract of Ceriops
decandra and Diospyros malabarica. However, pre-mor danting with aluminium and/or ferrous sulphate would
promote the depth of shade and colourfastness properties
further. Calcium and magnesium are found to be present in
appreciable amount in the different river water considered
in this study and are found to be higher than that present in
water collected from Kolkata Municipality Corporation.
Analysis of different river and aquifer water showed the
presence of different metals and heavy metals and their
value stays well below the specified permissible limit as
mentioned in WHO standard. The presence of such trace
amount of different metals played a significant role in
promoting dye uptake and all round colourfastness prop erties also. The presence of such metal in the dyed fabric
also appeared to stay much below the limit of Oeko-Tex
standard referred often for producing environment friendly
textiles.
