Dye is obtained from the processing of the plant's leaves. They are soaked in water and fermented in order to convert the glycoside indican naturally present in the plant to the blue dye indigotin. The precipitate from the fermented leaf solution is mixed with a strong base such as lye, pressed into cakes, dried, and powdered. The powder is then mixed with various other substances to produce different shades of blue and purple.
- Lump's Form This is the hard form of the natural indigo dyes which is useful in lye and other substances.
- Powder Form The powder form of the indigo dye is mixed with various substances to produce different shades of blue and purple.