Gum Rosin is a natural resin material and can be soluble in ethanol, dissolved in chloroform, acetic acid but not soluble in water. Evaporation of water produces a turpentine oil, and leaves Rosin. It consists of 70-75% rosin, 10-20% of turpentine oil and 5-7% of water and impurities. Gum Rosin is 60-65% total rosin acid and consists of revo acid and nel-abietic acid. Turpentine is used for mainly ointments, paints, and solvents and Rosin is used for mainly paint, ink, soap, rubber, sealant, paper and medicine.
Rosin, also called colophony is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene components. It is semi-transparent and varies in color from yellow to black. Rosin is the resinous constituent of the oleo-resin exuded by various species of pine, known in commerce as crude turpentine. The separation of the oleo-resin into the essential oil (spirit of turpentine) and common rosin is accomplished by distillation in large copper stills. The essential oil is carried off at a temperature of between 100° and 160 °C, leaving fluid rosin, which is run off through a tap at the bottom of the still, and purified by passing through straining wadding. Rosin varies in color, according to the age of the tree from which the turpentine is drawn and the degree of heat applied in distillation, from an opaque, almost pitch-black substance through grades of brown and yellow to an almost perfectly transparent colorless glassy mass. The commercial grades are numerous, ranging by letters from A (the darkest) to N (extra pale), superior to which are W (window glass) and WW (water-white) varieties, the latter having about three times the value of the common qualities.
Adhesives, Sealants industry, Construction Materials, Fine Chemical industry, Synthetic Rubber, Paint and Coating,Printing Ink, Soap and personal care industry.