... Red ColorPurple Sweet Potato Color's raw material is organic sweet purple potatoes, a pure natural and water ... purple sweet potato (Impomoea batatas ) planted locally.The process is checking, washing, slicing, extracting, filtrating, purifying, concentrating, ... ), spraying & drying(purple sweet potato color powder).organic sweet purple potatoes red coloring Test ItemResultValeur,Plumbum,ArsenicValeur ...