Colophony
Colophony[edit | edit source]
Colophony, also known as rosin, is a solid form of resin obtained from pines and some other plants, mostly conifers. It is produced by heating fresh liquid resin to vaporize the volatile liquid terpene components. Colophony is semi-transparent and varies in color from yellow to black. It is brittle at room temperature but melts at stove-top temperatures.
Properties[edit | edit source]
Colophony is composed mainly of resin acids, particularly abietic acid. It is insoluble in water but dissolves in alcohol, ether, and other organic solvents. The material is known for its tackiness and is used to increase friction in various applications.
Uses[edit | edit source]
Colophony has a wide range of applications:
- In the music industry, it is applied to the bows of string instruments to provide friction between the bow hair and the strings.
- In sports, it is used by gymnasts, weightlifters, and baseball pitchers to improve grip.
- In electronics, colophony is used as a flux in soldering to clean and prevent oxidation of metal surfaces.
- It is also used in the production of varnishes, adhesives, and sealing wax.
Health Effects[edit | edit source]
Exposure to colophony can cause allergic contact dermatitis in sensitive individuals. It is a common allergen and can cause skin irritation upon contact. Inhalation of colophony fumes, especially in occupational settings, can lead to respiratory issues such as asthma.
History[edit | edit source]
The use of colophony dates back to ancient times. It was named after the ancient Ionic city of Colophon, where it was prepared and traded. The material has been used historically in various applications, from medicine to art.
Also see[edit | edit source]
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