Gum Rosin is a nature solid form of pine oleoresin from pine trees, according as the specification, the range of colors from yellow to black, so it was also called colophony. It is a crude raw material used on industrial, on ordinary application, such like paper making, soap, lubrication oil for stringed instruments. But we can see the demonstrable weakness, such as the dark color, high acid value, or chemical structural instability.
For the refined preparation process of coatings, inks, adhesive and agriculture. Modification on gum rosin is the research trend on market.