Wongsky

Description

A bright yellow natural dyestuff obtained from the red berry-like fruit of the Gardenia grandiflora that is native to China. Wongsky has been used to dye silk a bright yellow color. The primary colorants in wongsky are Crocetin and Crocin. Crocetin is a substantive dye that is also found in Saffron.

Synonyms and Related Terms

wongshy; Chinese yellow pods; Chinese yellow berries; Natural Yellow 6; hoang-tchy; crocin; crocetin; Gardenia grandiflora

Physical and Chemical Properties

Crocetin is soluble in water, ethanol, alkali solutions.
Crocetin forms a blue solution in concentrated sulfuric acid.

Resources and Citations

Helmut Schweppe, Schweppe color collection index and information book

Encyclopedia Britannica, http://www.britannica.com Comment: "Gardenia." (Accessed 7 Apr. 2005).

F. Crace-Calvert, Dyeing and Calico Printing, Palmer & Howe, London, 1876

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

Wongsky

Contents

Description

Synonyms and Related Terms

Physical and Chemical Properties

Resources and Citations

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Wongsky

Description

Synonyms and Related Terms

Physical and Chemical Properties

Resources and Citations

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