... coating, inks, rubber, soaps, paper e glycerol ester of gum rosin has been general used for ink, adhesive, paint, food and ... , inks, rubber, soaps, electronic industrial products, food grade ester gum, rosin ester resins etc.3. Packing:(1) Drum: Galvanized iron drum ... Republic of China. If there are changes, the latest specification will be executed and assured by contract. glycerol ester of gum rosin