What is rosin??!
Question: What is rosin!?!?
what the heck rosin is!?!?and what is the use of it!?Www@Enter-QA@Com
Answers:
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!.
Uses
Rosin is an ingredient in printing inks, varnishes, adhesives (glues), soap, paper sizing, soda, soldering fluxes, and sealing wax!.
Rosin can be used as a glazing agent in medicines and chewing gum!. It is denoted by E number E915!. A related glycerol ester (E445) can be used as an emulsifier in soft drinks!. In pharmaceuticals, rosin forms an ingredient in several plasters and ointments!.
In industry, rosin is the precursor to the flux used in soldering!. The lead-tin solder commonly used in electronics has about 1% rosin as a flux core helping the molten metal flow and making a better connection by reducing the refractory solid oxide layer formed at the surface back to metal!. It's frequently seen as the burnt or clear residue around new soldering!.
A mixture of pitch and rosin is used to make a surface against which glass is polished when making optical components such as lenses!.
Rosin is added in small quantities to traditional linseed oil/sand gap fillers, used in building work!.
When mixed with waxes and oils, rosin is the main ingredient of mystic smoke, a gum which, when rubbed and suddenly stretched, appears to produce puffs of smoke from the finger tips!.
Rosin is extensively used for its friction-increasing capacity:
* Bowed string players rub cakes or blocks of rosin on their bow hair so it can grip the strings and make them speak!. Extra substances such as beeswax, gold, silver, tin, or meteoric iron are sometimes added to the rosin to modify its stiction/friction properties, and (disputably) the tone it produces!. Powdered rosin is often applied to new hair, for example with a felt pad or cloth, to reduce the time taken in getting sufficient rosin onto the hair!.
* Violin rosin can be applied to bridges in other musical instruments, such as the Banjo and Banjolele, in order to stop the bridge moving during vigorous playing!.
* Ballet dancers sometimes rub their shoes in powdered rosin to reduce slipping before going on stage - it was at one time used in the same way in fencing!.
* Bull riders rub rosin on their rope and glove for additional grip!.
* Baseball pitchers and ten-pin bowlers may have a small bag of powdered rosin nearby, to use on their throwing hand, for better control of the ball!.
Production
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 effected 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!.
Other sources of rosin includes rosin (called tall oil rosin) obtained from the distillation of Crude Tall Oil (CTO)!. Crude Tall Oil is a byproduct obtained from the kraft paper making process!. Additionally rosin may be obtained from aged pine stumps!. This type of rosin is typically called wood rosin!. In this process, aged wood stumps are chipped and soaked in a solvent solution!. The solvents are recovered along with the rosin, fatty acids, turpentine, and other constituents through distillation!.
On a large scale, rosin is treated by destructive distillation for the production of rosin spirit, pinoline and rosin oil!. The last enters into the composition of some of the solid lubricating greases, and is also used as an adulterant of other oils!.Www@Enter-QA@Com
Uses
Rosin is an ingredient in printing inks, varnishes, adhesives (glues), soap, paper sizing, soda, soldering fluxes, and sealing wax!.
Rosin can be used as a glazing agent in medicines and chewing gum!. It is denoted by E number E915!. A related glycerol ester (E445) can be used as an emulsifier in soft drinks!. In pharmaceuticals, rosin forms an ingredient in several plasters and ointments!.
In industry, rosin is the precursor to the flux used in soldering!. The lead-tin solder commonly used in electronics has about 1% rosin as a flux core helping the molten metal flow and making a better connection by reducing the refractory solid oxide layer formed at the surface back to metal!. It's frequently seen as the burnt or clear residue around new soldering!.
A mixture of pitch and rosin is used to make a surface against which glass is polished when making optical components such as lenses!.
Rosin is added in small quantities to traditional linseed oil/sand gap fillers, used in building work!.
When mixed with waxes and oils, rosin is the main ingredient of mystic smoke, a gum which, when rubbed and suddenly stretched, appears to produce puffs of smoke from the finger tips!.
Rosin is extensively used for its friction-increasing capacity:
* Bowed string players rub cakes or blocks of rosin on their bow hair so it can grip the strings and make them speak!. Extra substances such as beeswax, gold, silver, tin, or meteoric iron are sometimes added to the rosin to modify its stiction/friction properties, and (disputably) the tone it produces!. Powdered rosin is often applied to new hair, for example with a felt pad or cloth, to reduce the time taken in getting sufficient rosin onto the hair!.
* Violin rosin can be applied to bridges in other musical instruments, such as the Banjo and Banjolele, in order to stop the bridge moving during vigorous playing!.
* Ballet dancers sometimes rub their shoes in powdered rosin to reduce slipping before going on stage - it was at one time used in the same way in fencing!.
* Bull riders rub rosin on their rope and glove for additional grip!.
* Baseball pitchers and ten-pin bowlers may have a small bag of powdered rosin nearby, to use on their throwing hand, for better control of the ball!.
Production
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 effected 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!.
Other sources of rosin includes rosin (called tall oil rosin) obtained from the distillation of Crude Tall Oil (CTO)!. Crude Tall Oil is a byproduct obtained from the kraft paper making process!. Additionally rosin may be obtained from aged pine stumps!. This type of rosin is typically called wood rosin!. In this process, aged wood stumps are chipped and soaked in a solvent solution!. The solvents are recovered along with the rosin, fatty acids, turpentine, and other constituents through distillation!.
On a large scale, rosin is treated by destructive distillation for the production of rosin spirit, pinoline and rosin oil!. The last enters into the composition of some of the solid lubricating greases, and is also used as an adulterant of other oils!.Www@Enter-QA@Com