Existed in the plant in form which mixed the body of candy indigoly, generally draw from the indigo plant, soak among water the stem leaf of plant, ferment, hydrolyze, oxidize, get indigo.

• 特别需要指出的是， 同种天然染料，当使用不同的媒染剂染色时，往往会使被染纤维呈现不同的色相。