Nyctanthes- Arbor-tristis Linn, commonly known as the Night flowering sad tree (harsingar). Its Flowers are rich in yellow colouring matter,easily soluble in water. The corolla tubes are orange-colored tubes found inside the flower and when severed from the hand give a beautiful fleeting orange or golden dye. The bright orange corolla tubes of the flower contain a saffron-yellow coloring matter called Nyctanthin, which is identical with crocetin from saffron. In Himalayan areas, the dye is also used for dyeing cotton cloth and as a cheap substitute for saffron in coloring the robes of Buddhist priests! Arbor is rich in yellow coloring matter, which is readily soluble in water. It is also used for coloring different kind of fabrics (cotton, silk, wool etc) and for imparting color to liquor.
(A) Pre Mordant 1 :- Pre-treat the material with alum 10% of fabric weight at 80°C for 60 mins.
(B) Dyeing :- Add the required amount of dye to the dye bath. pH of dye bath needs to be maintained at pH 3. If it's 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 90°C for 60-80 mins. We check all our natural dyes at 30% of fabric weight, you can amend the percentage as per lighter or darker shade required.
(C) Post Treatment :- Conduct soaping of the dyed material with non-ionic detergent (0.5gpl) at 50°C for 35 mins.
(D) Hot wash and then cold wash the material.
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