Difference between revisions of "Sierra Leone copal"

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== Description ==
 
== Description ==
 
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[[[SliderGallery rightalign|MFA- Copal, Sierra Leone.jpg~FTIR]]]
 
A medium-hard variety of [[copal|copal]] resin obtained from the ''Copaifera guibourtiana'' tree native to the British colony of Sierra Leone in Africa. Sierra Leone copal is a pale yellow uniform [[natural%20resin|resin]] that has been used in [[varnish|varnishes]].
 
A medium-hard variety of [[copal|copal]] resin obtained from the ''Copaifera guibourtiana'' tree native to the British colony of Sierra Leone in Africa. Sierra Leone copal is a pale yellow uniform [[natural%20resin|resin]] that has been used in [[varnish|varnishes]].
  
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''Copaifera guibourtiana''; copal de Sierra Leona (Esp.)
 
''Copaifera guibourtiana''; copal de Sierra Leona (Esp.)
  
[[[SliderGallery rightalign|MFA- Copal, Sierra Leone.jpg~FTIR]]]
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== Risks ==
 
 
== Other Properties ==
 
 
 
Slightly soluble in acetone, amyl alcohol, ethanol, benzene, ether, turpentine.  Saponification number = 146-150;  Acid number = 109-114.  Most copals fluoresce white under short-wave UV light.
 
  
{| class="wikitable"
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* Combustible, burning with a bright flame, dense smoke, and strong smell.
|-
 
! scope="row"| Melting Point
 
| 130-200
 
|}
 
  
== Hazards and Safety ==
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==Physical and Chemical Properties==
  
Combustible, burning with a bright flame, dense smoke, and strong smell.
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* Slightly soluble in acetone, amyl alcohol, ethanol, benzene, ether, turpentine. 
 +
* Saponification number = 146-150
 +
* Acid number = 109-114. 
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* Most copals fluoresce white under short-wave UV light.
 +
* Melting Point = 130-200 C
  
== Sources Checked for Data in Record ==
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==Resources and Citations==
  
* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966  Comment: gives trees as Copaifera guibourtiana
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* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966  Comment: gives trees as ''Copaifera guibourtiana''
  
 
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
 
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
  
* Website address 1  Comment: "Copal: An Immature and Controversial Resin" at www.emporia.edu/earthsci/amber/copal.htm - gives tree as Copaifera guibourthiana
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* "Copal: An Immature and Controversial Resin" at www.emporia.edu/earthsci/amber/copal.htm - gives tree as Copaifera ''guibourthiana''
  
  
  
 
[[Category:Materials database]]
 
[[Category:Materials database]]

Latest revision as of 07:32, 31 May 2022

Description

FTIR

MFA- Copal, Sierra Leone.jpg

A medium-hard variety of Copal resin obtained from the Copaifera guibourtiana tree native to the British colony of Sierra Leone in Africa. Sierra Leone copal is a pale yellow uniform resin that has been used in varnishes.

Synonyms and Related Terms

Copaifera guibourtiana; copal de Sierra Leona (Esp.)

Risks

  • Combustible, burning with a bright flame, dense smoke, and strong smell.

Physical and Chemical Properties

  • Slightly soluble in acetone, amyl alcohol, ethanol, benzene, ether, turpentine.
  • Saponification number = 146-150
  • Acid number = 109-114.
  • Most copals fluoresce white under short-wave UV light.
  • Melting Point = 130-200 C

Resources and Citations

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966 Comment: gives trees as Copaifera guibourtiana
  • "Copal: An Immature and Controversial Resin" at www.emporia.edu/earthsci/amber/copal.htm - gives tree as Copaifera guibourthiana

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