Raisins are made primarily by sun-drying several different types of grapes. They are small and sweetly flavored with a wrinkled texture. Background of raisin The technique for making raisins has been known since ancient times and evidence of their production has been found in the writings of ancient Egyptians. Currently, over 500 million lb (227 million kg) of raisins are sold each year in the United States, and that...