... Packed in new Iron Drums of 225kgs net of each, Gum Rosin ww grade, resin Used in paper, ink, rubber, ... adhesives, glue, soap, synthetic resins.Features:1) China original gum rosin WW grade2) Natural organic compound, mainly composed of resins3) ... printing ink, resin acid is changed into disproportionate rosin, polymerized rosin, hydrogenated rosin, for further use by its double bond reactionPacking: ...