... ink, rubber, paints and varnish, various adhesives, glue, soap, synthetic resins.Features:1) China original gum rosin WW grade2) Natural organic ... produce resinate for further use7) In the producing of synthetic rubber and printing ink, resin acid is changed into ... , rubber, paints and varnish, various adhesives, glue, soap, synthetic resins, chewing gum and other chemical industries WW Grade Gum Rosin