Rosin resin SOR 424 ke resin e fetotsoeng e mebala e bobebe ebile e tsitsitse, e thehiloeng ho rosin le unsaturated polyacid e le lisebelisoa tsa mantlha tse tala.Rosin le maleic anhydride bakeng sa karabelo e eketsehileng le esterification ea pentaerythritol, 'me e ntlafatsoa ka ho hloekisoa, decolorization, phetoho le lits'ebetso tse ling.Varnish e hlahisoang ke eona e na le melemo ea khanya e phahameng, boima bo phahameng le ho khomarela ka matla.