... esterification with glycerol Glycerol ester of gum rosin are made from gum rosin or refined gum rosin through esterification with glycerol, Used in ... & Chemicals Co. Ltd. (WSSFC), was previously known as Cangwu County Rosin Plant, which was established in the year of 1985 in ... gum in China. Capacity of its main products are: Gum Rosin 40,000MT, Turpentine 5,200MT, Food Grade Ester Gum 6 ...