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Extracted From The Bignonia Chica By Boiling Its Leaves In Water








decanting the decoction, and allowing it to cool, when a red matter
falls down, which is formed into cakes and dried. Insoluble in cold
water, it dissolves in alcohol and alkalies; is precipitated from
alkaline solutions by acids without alteration; and is bleached by
chlorine. Another variety of the same substance, obtained from Para in
Brazil, and known as crajuru, carajuru, or caracuru, behaves in a
similar manner. This is said to be superior to the former sort.

A chica pigment, brought from South America, and examined by the author,
was of a soft powdery texture, and rich marrone colour. Somewhat
resembling Rubens' madder in hue, it was equal in body and transparency
to the carmine of cochineal, though by no means approaching it in
beauty, or even in durability. Simply exposed to the light of a window,
without sun, the colour was soon changed and destroyed. Conclusive
evidence as this is that the sample submitted to Mr. Field was
worthless, it remains to be seen whether all the colours to be derived
from chica, by different modes and from different kinds, are equally
valueless as pigments.




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