Botanical Name -Rheum Emido
Common Name - Ruharb
Other Name - Revanchini
Part Used - Roots
Uses - Textile Dying , Medical Purposes.
Rheum Emodi, commonly known as Himalayan rhubarb, is a medicinal herb used in the Ayurvedic system of medicine and it 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 gives golden yellow shade with the salt Alum and copper sulphate on wool and silk. It belongs to the family polygonacease. Rheum Emodi has been used in various traditional system as laxative, tonic, diuretic and to treat fever, cough, indigestion, menstrual disorder since antiquity. This plant shares core medicinal values in the Indian Ayurveda, as it acquires anti-inflammatory and anti bacterial properties. The medicinal properties of the same are as purgative and astringent tonic. Rhubarb is used as purgative. The most common constituents of Rheum emodi possess anticancer, antioxidant, anti-inflammatory, antimicrobial, anti fungal, nephroprotective activities.
Botanical Name - Rheum Emodi Common name - Himalayan Rubharb Other Name - Revanchini Part Used -Roots Uses - Textile Dyeing, Ayurdeva And Food Colours Apsara yellow or an India Ruharb is a stout herb mainly found in the Himalayas, it is distributed from Kashmir to Sikkim. The stout roots are the chief source of golden yellow colour and mainly use as colorant in textile industry. The chief colouring component of Rheum emodi is chrysophonic acid. Colouration of silk and wool with Rheum emodi is found to be effectively accomplished within a wide pH range of 4-8. Dye uptake, rate of dyeing and affinity of this colour are found to be higher for silk fibre than that for wool fibre.
