colophony

/kə'lɔfəni/

Thân thiện

A violinist applies colophony to the bow before a performance.

Definition

Noun: A translucent, brittle, yellowish substance obtained as a residue after distilling the crude oleoresin (turpentine) from pine trees. It is primarily composed of rosin acids and is used in various industrial applications, notably in varnishes, inks, adhesives, and for treating the bows of stringed instruments to increase friction on the strings.

Usage and Examples

• General Use: Colophony is a key ingredient in many traditional products.
  • The violin rosin is made from purified colophony.
  • The old formula for the varnish included a significant amount of colophony.
• Industrial/Technical Use: It is valued for its adhesive and friction-enhancing properties.
  • The printer's ink uses colophony as a binder to help it adhere to paper.
  • Soldering fluxes often contain colophony to clean the metal surfaces.

Advanced Usage and Notes

• Chemical Context: In chemistry and industry, colophony is often referred to simply as rosin. It is distinct from fresh pine resin or turpentine, which are its liquid precursors.
  • The chemical analysis confirmed the sample was primarily abietic acid, a major component of colophony.
• Allergen Note: Colophony is a known contact allergen. This is a critical consideration in occupational health and product safety.
  • The safety data sheet warns that colophony may cause skin sensitization.

Variants and Related Words

• Rosin (noun): The most common synonym for colophony, especially in musical and sporting contexts (e.g., violin rosin, baseball rosin).
• Gum Rosin (noun): A specific grade of colophony obtained from tapping living pine trees.
• Tall Oil Rosin (noun): A type of rosin obtained as a byproduct of the wood pulp industry.

Synonyms

• Rosin (primary synonym)
• Greek Pitch (archaic/historical term)
• Pine Resin (broader term; colophony is a processed form of pine resin)

Related Phrases and Compounds

• Colophony Flux: A type of flux used in electronics soldering.
• Colophony Allergy: A medical term for hypersensitivity to this substance.

Học thuật

Noun

1. translucent brittle substance produced from pine oleoresin; used especially in varnishes and inks and on the bows of stringed instruments