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Rosin

Other Names: Gum rosin, colophony, pine resin, wood rosin
Viscosity: Varies from a few hundred cPs. to 20,000 cPs. depending on temperature and/or solvent. Rosins without solvents are often handled in the 204 to 260°C / 400 to 500°F. temperature range.
Sp. Gr.: 1.1

Remarks: Rosin occurs as angular, translucent, amber-colored fragments. M.p. in the 93 to 149°C / 200 to 300°F range; insoluble in water; soluble in alcohol, benzene, ether and oils. It is obtained from pine trees by distillation process. Rosin is used in making linoleum, in making soldering compounds, core oils, insulating compounds, molding compounds, sealing waxes, medicines, in paper sizing, printing inks and varnishes. Rosin is combustible; gives off flammable vapors when heated.

Pump Notes: Cast iron construction is usually satisfactory although stainless steel may also be requested. Elastomer and shaft sealing recommendation depends on the particular rosin and temperature