Difference between revisions of "Turnsole"

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heliotrope trioccum; sunflower blue; ''Chrozophora tinctoria''; tornasol (Esp.); tournesol (Fr.); tornesol (Port.)
 
heliotrope trioccum; sunflower blue; ''Chrozophora tinctoria''; tornasol (Esp.); tournesol (Fr.); tornesol (Port.)
  
== Authority ==
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== Resources and Citations ==
  
* R. J. Gettens, G.L. Stout, R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966
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* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966
  
* Ralph Mayer, Ralph Mayer, ''A Dictionary of Art Terms and Techniques'', Harper and Row Publishers, New York, 1969 (also 1945 printing)
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* Ralph Mayer, ''A Dictionary of Art Terms and Techniques'', Harper and Row Publishers, New York, 1969 (also 1945 printing)
  
* R.D. Harley, R.D. Harley, ''Artists' Pigments c. 1600-1835'', Butterworth Scientific, London, 1982
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* R.D. Harley, ''Artists' Pigments c. 1600-1835'', Butterworth Scientific, London, 1982
  
* Random House, Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997
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* Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997
  
 
* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 5574
 
* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 5574

Latest revision as of 11:21, 27 October 2020

Description

A natural purple dye obtained from the seeds of the European turnsole plant, Chrozophora tinctoria. Turnsole is an acid-base indicator dye that is red in acid and blue to violet in alkalis. It was used as a violet watercolor pigment in 14th century Italian manuscripts (Gettens and Stout 1966). Turnsole was also used as a purple textile dye from medieval times to the 17th century. It is not lightfast.

Synonyms and Related Terms

heliotrope trioccum; sunflower blue; Chrozophora tinctoria; tornasol (Esp.); tournesol (Fr.); tornesol (Port.)

Resources and Citations

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
  • R.D. Harley, Artists' Pigments c. 1600-1835, Butterworth Scientific, London, 1982
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 5574