Difference between revisions of "Lokao"
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lo-kao; Chinese green; buckthorn bark; vert-venus; vert-azof; vert-lumiere; Rhamnus globosa; ''Rhamnus chlorophorus''; ''Rhamnus utilis'' | lo-kao; Chinese green; buckthorn bark; vert-venus; vert-azof; vert-lumiere; Rhamnus globosa; ''Rhamnus chlorophorus''; ''Rhamnus utilis'' | ||
| − | == | + | ==Physical and Chemical Properties== |
Soluble in alkalis (turns violet) and acids. Slightly soluble in water. Insoluble in alcohol, ether, carbon disulfide. | Soluble in alkalis (turns violet) and acids. Slightly soluble in water. Insoluble in alcohol, ether, carbon disulfide. | ||
| − | == | + | ==Resources and Citations== |
* Ralph Mayer, ''A Dictionary of Art Terms and Techniques'', Harper and Row Publishers, New York, 1969 (also 1945 printing) | * Ralph Mayer, ''A Dictionary of Art Terms and Techniques'', Harper and Row Publishers, New York, 1969 (also 1945 printing) | ||
| − | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "Rhamnales" | + | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "Rhamnales" [Accessed October 9, 2001] |
* F. Crace-Calvert, ''Dyeing and Calico Printing'', Palmer & Howe, London, 1876 Comment: p. 301 | * F. Crace-Calvert, ''Dyeing and Calico Printing'', Palmer & Howe, London, 1876 Comment: p. 301 | ||
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* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 283 | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 283 | ||
| − | * Art and Architecture Thesaurus Online, | + | * Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000 |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 10:30, 16 October 2022
Description
A natural green dye obtained from the powdered bark of the buckthorn bushes (Rhamnus globosa, Rhamnus chlorophorus, and Rhamnus utilis) that are native to China and Russia. The dye is extracted from the leaves, roots and bark with an alkaline solution. Lokao was a popular green in the 19th century because it appeared green in both daylight and artificial light. It was used for dyeing silk and cotton. The color, however, was not lightfast and was superseded by aniline greens.
Synonyms and Related Terms
lo-kao; Chinese green; buckthorn bark; vert-venus; vert-azof; vert-lumiere; Rhamnus globosa; Rhamnus chlorophorus; Rhamnus utilis
Physical and Chemical Properties
Soluble in alkalis (turns violet) and acids. Slightly soluble in water. Insoluble in alcohol, ether, carbon disulfide.
Resources and Citations
- Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
- Encyclopedia Britannica, http://www.britannica.com Comment: "Rhamnales" [Accessed October 9, 2001]
- F. Crace-Calvert, Dyeing and Calico Printing, Palmer & Howe, London, 1876 Comment: p. 301
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 283
- Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000