Wash and dry. Peach gum is the secretion of the peach tree into the resin, so peach gum contains more impurities, generally leaves, bark, etc., will be soaked in water, will absorb the expansion of the peach gum becomes larger, but also can see the black impurities inside out, if it is the picking of the fresh peach gum, generally the first to be washed with water to clean, will be the removal of impurities, and then put into the sun to dry, so that the peach gum into a solid granularity can be processed, can be put in a cool dry place to save. put into a cool dry place to save.