Acacia nilotica, is a genus of shrubs belonging to the sub-family Fabaceae. Mainly its bark being rich in phenolic such as tannins, quercetin, catechin. Also used in dyeing and cosmetics. Garnet Brown extract can be seen as dry dark brown yellow crystalline powder that is very stable and of high color fastness. Extracting the main coloring component from the bark and pods of the tree by boiling them in water, it gives a slippery liquid. When the liquid is evaporated and the remaining extract behind which is a rich source of tannins called catechin and is easily soluble in water.
(A) Wet the fabric with wetting agent/soapnut(Reetha) or normal wash with water at 50 degree for 20 mins.
(B) Pre Mordant :- Pre-treat the material with alum 12% of fabric weight at 85°C for 60 mins.
(C) Dyeing :- Add the required amount of dye to the dye bath. PH of dye bath needs to be maintained at pH 3. If it is higher than pH, 3 add vinegar, if below pH 3, use lime or soda ash. Stir well to dissolve the dye. Add fabric to the dye bath and maintain at 95°C for 60-80 mins. We check all our natural dyes at 5% of fabric weight; you can amend the percentage as per lighter or darker shade required.
(D) Post Treatment :- Conduct soaping of the dyed material with non-ionic detergent (0.5gpl) or ezee soap at 50°C for 35 mins.
(E) Then conduct cold wash of the material at 50°C for 20 mins or more time.
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