Botanical Name

rheum emodi

Common name

himalayan rubharb

Other Name


Part Used



textile dyeing, ayurdeva and food colours

Color Ranges:

Product Descriptions:

Apsara dye is made of Rheum emodi also known by the name Himalayan rhubarb, is a conventional natural dye used for textile. It makes bright yellow colour and obtains an odoriferous property. This dye is produced by drying the rhizome and roots of a Rheum Emodi. Dye is extracted in aqueous medium from dry powdered materials. The dye when dissolved in soft water and gives golden yellow shade with the salt Alum and copper sulphate on wool and silk. This plant shares core medicinal values in the Indian Ayurveda, it acquires anti-inflammatory and anti–bacterial properties. The medicinal properties of the same are as purgative and astringent tonic.

Dyeing Process

sodhani biotech

(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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