Indigo is a natural blue dye substance of batik extracted from the leaves of indigo plant. which is eco-friendly and non-carcinogenic. To be able to extract an indigo dye substance. the indican glycosides contained in the leaves of the plant is first hydrolyzed into Indigo indoxyl and glucose by using either the dilute mineral acids or enzymes. https://pipingrockers.shop/product-category/d-ribose/