... food, acidic beverages, wine, jam. Red grape peel pigment, a purely natural and water-, alcohol-, and ethylic acid-soluble color, is ... food or food-related industries.Precaution: Red grape peel pigment is stable under heating during pasteurization. This method can ... .Shelf life:Unopened, lasts one year.Red grape peel pigment, a purely natural and water-, alcohol-, and ethylic acid-soluble color, ...