Qingdao Pengyuan Natural Pigment Research Institute is a high-tech enterprise collected scientific research, producing, and sale in a body. The natural food colorents developed by the institute includes purple sweet potato red pigment, perilla red pigment, cabbage red pigment, gardenia yellow (blue, green), Radish red pigment, Grape skin red pigment, and more than 10 kinds of natural pigments, with annual production capacity of 100 tons. The natural ...