Difference between revisions of "Cassel brown"
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== Description == | == Description == | ||
| − | A naturally occurring dark brown earth named for a city in central Germany. Cassel earth, also known as [[ Vandyke brown | + | A naturally occurring dark brown earth named for a city in central Germany. Cassel earth, also known as [[Vandyke brown]], contains organic humus or coal material mixed with iron oxides, alumina, and silica. When ignited, the pigment leaves a soft gray residue. The colorant is fugitive and fades on exposure to strong light. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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Slightly soluble in oil. Discolors in alkalis turning grayish. | Slightly soluble in oil. Discolors in alkalis turning grayish. | ||
| − | == | + | == Resources and Citations == |
| − | Georgiana Languri, Molecular studies of Asphalt, Mummy and Kassel earth pigments, MOLART report 2004, available through Archetype Publications, London. | + | * Georgiana Languri, Molecular studies of Asphalt, Mummy and Kassel earth pigments, MOLART report 2004, available through Archetype Publications, London. |
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* Helmut Schweppe, Schweppe color collection index and information book | * Helmut Schweppe, Schweppe color collection index and information book | ||
Revision as of 12:37, 6 August 2020
Description
A naturally occurring dark brown earth named for a city in central Germany. Cassel earth, also known as Vandyke brown, contains organic humus or coal material mixed with iron oxides, alumina, and silica. When ignited, the pigment leaves a soft gray residue. The colorant is fugitive and fades on exposure to strong light.
Synonyms and Related Terms
Cassel earth; Natural Brown 8; CI 77727; pardo Van Dyke (Esp.); brun de Cassel (Fr.); marrone di Cassel (It.); Cassel's earth; Kassel earth; Cologne earth; Vandyke brown; Castle earth; Castile earth; Cullens earth; Colens earth; Collens earth
Other Properties
Slightly soluble in oil. Discolors in alkalis turning grayish.
Resources and Citations
- Georgiana Languri, Molecular studies of Asphalt, Mummy and Kassel earth pigments, MOLART report 2004, available through Archetype Publications, London.
- Helmut Schweppe, Schweppe color collection index and information book
- M. Doerner, The Materials of the Artist, Harcourt, Brace & Co., 1934
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 558
- Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
- Colour Index International online at www.colour-index.org