Gum Rosin Posted By HUPCChemical -
China
Summary: gum rosin 1 grade ww wg appearance transparent solid softening point 76 75 74
Product Category:
Gum rosin [3]
Selling Polymerized Rosin Posted By xzwp -
China
Summary: polymerized rosin gum sulphric acid chloride zinc content dimers softening point