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Rosin resin SOR 424 is a light-colored and stable modified resin, which is based on rosin and unsaturated polyacid as the basic raw materials. Rosin û Anhydride Maleic ji bo reaksiyonê û girseya zêdebûna Pentaerythritol, û ji hêla refînekirin, dekolorkirin, guhastin û pêvajoyên din ve pêşve çû. The varnish produced by it has the advantages of high brightness, high hardness and strong adhesion.