Juglans Regia also known as Walnut, is a large deciduous tree mainly grown in poor soil. The colour is derived from the shell of walnut fruit. It is cultivated commercially in Asia, Europe, South America and United states. The parts used for textile dyeing are leaves, bark and husk. Apart from textile dyeing it is also used in medicinal industry. Walnut is used for study different dyeing properties for different textile. The main colour component was extracted by boiling the bark powder at high temperature and then it is cooled down and filtered. The remaining residue is again heated for 2-3 times for obtaining the remaining colour component. These extracts are highly rich in colouring matter and gives different shades of brown colour while dyeing the cotton, silk and wool fabrics with the use of organic mordents. This extracts have very good light, wash and rub fastness.
(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 7. If it's higher than pH 7 add vinegar, if below pH 7, 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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