Difference between revisions of "Gunari"
Jump to navigation
Jump to search
m (Text replace - "== Authority ==" to "== Sources Checked for Data in Record ==") |
|||
| Line 15: | Line 15: | ||
J.Hofenk-de Graaf, ''Natural Dyestuffs: Origin, Chemical Constitution, Identification'', Central Research Laboratory for Objects of Art and Science, Amsterdam, September 1969. | J.Hofenk-de Graaf, ''Natural Dyestuffs: Origin, Chemical Constitution, Identification'', Central Research Laboratory for Objects of Art and Science, Amsterdam, September 1969. | ||
| − | == | + | == Sources Checked for Data in Record == |
* Helmut Schweppe, Schweppe color collection index and information book | * Helmut Schweppe, Schweppe color collection index and information book | ||
Revision as of 05:03, 1 May 2016
Description
A bright yellow, natural dyestuff obtained from the leaves of the Indian mahogany tree, Cedula toona, native to the southern Asia. Gunari has been used to dye wool and silk a bright yellow color. The primary colorant in gunari is Crocetin. Crocetin is a substantive dye that is also found in Saffron.
Synonyms and Related Terms
Natural Yellow 4
Other Properties
Crocetin is soluble in water, ethanol, alkali solutions. Crocetin forms a blue solution in concentrated sulfuric acid.
Additional Information
J.Hofenk-de Graaf, Natural Dyestuffs: Origin, Chemical Constitution, Identification, Central Research Laboratory for Objects of Art and Science, Amsterdam, September 1969.
Sources Checked for Data in Record
- Helmut Schweppe, Schweppe color collection index and information book
- Colour Index International online at www.colour-index.org
- Judith Hofenk-de Graaff, Natural Dyestuffs: Origin, Chemical Constitution, Identification, Central Research Laboratory for Objects of Art and Science, Amsterdam, 1969