. Conclusions
The purpose of this study is to investigate
the effect of temperature, time, pH and
mordant type on dyeing properties and colour
fastness of silk and cotton fabrics dyed with
eucalyptus bark extract solution. It was found
that silk and cotton fabric were treated with
pre-mordanting process before dyeing experiments,
in order to facilitate dye absorbency
of fabric such as silk dyeing at 90 °C for 40
minutes and pH 4, cotton dyeing at 60 °C for
40 minutes and pH no adjustment. The best
result was achieved when liquor ratio between
fabric and dyed solution as 1:30 was employed.
The K/S values of silk fabric increased in the
order of dyeing using Fe> Cu> Al> un-mordant>
Sn, however, the K/S value of the cotton fabric
increased in the order of dyeing using Sn> Fe>
Cu> Al> un-mordant. Silk dyed in the solution
from bark of eucalyptus showed the shade of
yellow-brown, excepting using ferrous (Fe)