Abstract: The extraction of red pigment from Pruns tomentosa with resin was studied in this research.The results showed that AB-8 resin had the best performance of absorbing the red pigment.In the course of desorbing the absorbed pigment,50% ethanol was optimal.AB-8 resin was selected during the experiment.After repeating 20 times,the absorption factor was only at a loss of 0.98%.The pigment has excellent water-solubility and stability in acid solution.The light,suitable heat and low density food additions also had no obvious influences on its stability.So the pigment from Solanum nigrum might be used as a good addition.

Key words: Pruns tomentosa, red pigment, resin, extraction, characteristic