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nature : natural rosin or tar resin as the main raw material by chemical processing and manufacturing of a Class Size. Tsung soap (from rosin by caustic soda derived saponification) Size, strengthen Rosin (with maleic anhydride or fumarate will rosin and saponification), the emulsion type Rosin (high-quality devices such as absorption scattered equipment will be strong Malay fumaric acid or other high-modified rosin into the emulsion stability) three. Pine soap Size of the oldest, has been gradually eliminated and strengthen the extensive use of rosin, it has gradually been emulsion Rosin Size replaced.
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