Air dried leaves of henna were ground and
extracted with 95 % ethyl alcohol to separate
the extracted dyes,and the extracted
materials were transferred to vacuum rotary
evaporator to remove the excess alcohol,
cooling the residue for 24 hr, The cooled
samples were frozen at 10 °C for 4 hrs , on
plastic trays. On the other hand, samples of
red onion skin each of 100 g weight were
boiled in one liter of soft water until it was
reduced to 500 ml. The extracted liquor was
then filtered and used in dyeing.