... is made of natural resin, its general formula is C20H30O2. Gum rosin also called colophony, is a solid form of resin ... . It chiefly consists of different resin acids, especially abietic acid. Gum rosin is an important raw material for the manufacture of ... adhesive, coating, inks, rubber, soaps, paper etc. Gum rosin of our packing details:In galvanized iron drum, 225kgs ...