Purple cabbage is a cruciferous plant. Its pigment is anthocyanin present in leaf epidermal cells. Its main component is procyanidin, which has good antioxidant function.

The resin adsorption method for extraction purple cabbage pigment has not only low energy consumption, low cost and simple process, but also the quality of the obtained natural pigment product is obviously improved compared with the traditional extraction process. The pigment product has less impurities, the color value is high, and the application prospect is broad.