Indigo. The Textile Mercury, 12.3.1892 The chief source of natural indigo is the various species of Indigofera , especially Indigofera tinctoria ,...

"Shortly before flowering, or about three months after sowing, the plants are cut off close to the ground, and are then ready for the extraction of the colour. "
in Indigo, Textile Mercury, 12.3.1892
coloriasto.blogspot.com/2025/09/indi...

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Cedrela toona<br />CHAPTER XVIII. Colouring Matters of Unknown Constitution. <br />(Osa artikkelista) The Natural Organic Colouring Matters By Arthur George Perkin, F.R.S., F.R.S.E., F.I.C., professor of colour chemistry and dyeing in the U...

"The flowers constitute one of the less important Indian natural dyestuffs, and are reputed to yield both a red and a yellow dye" #gunari
-Cedrela toona; The Natural Organic Colouring Matters, 1918

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Tyrian Purple: The disgusting origins of the colour purple Created from the desiccated glands of sea snails, the colour purple has nevertheless come to define royalty. Kelly Grovier looks at how the hue shook off its unexpected source.

Tyrian Purple: The disgusting origins of the colour purple, by Kelly Grovier, BBC Aug 1, 2018

www.bbc.com/culture/arti...

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Gall Nuts.<br />(CHAPTER XIII. Tannins.) The Natural Organic Colouring Matters By Arthur George Perkin, F.R.S., F.R.S.E., F.I.C., professor of colour chemistry and dyeing in the U...

"These are morbid excrescences produced by the puncture of an insect called Cynips gallæ-tinctoria upon the leaves and young twigs of certain kinds of oak trees..."
in Gall Nuts; The Natural Organic Colouring Matters, 1918
coloriasto.blogspot.com/2025/02/gall...
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Anthocyan Pigments<br />Introduction<br />CHAPTER VIII. Pyran Group. Anthocyanins and Anthocyanidins.<br /> The Natural Organic Colouring Matters By Arthur George Perkin, F.R.S., F.R.S.E., F.I.C., professor of colour chemistry and dyeing in the U...

"The term #Anthocyan appears to have been introduced by Marquart (Die Farben der Blüten, Bonn, 1835) to designate the blue pigments present in flowers."
in Anthocyan pigments; The Natural Organic Colouring Matters, 1918
coloriasto.blogspot.com/2025/01/anth...
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