Scientific American 19, 5.5.1860
On these subjects J. Wiley, of this city, has recently published quite a large and handsome volume, the main part of which is by "an experienced dyer," with a brief supplement by R. Macfarlane. This latter contains almost all that is known regarding those new dyeing materials - aniline and murexide. It also gives the substance of quite a number of American and foreign patents obtained during the past five years; the object being to bring up the art to the present day. The information is conveyed in clear and plain language, so as to render it as thoroughly practical as possible under the circumstances. We quote the following from its columns as interesting to all:-
"A patent was issued to D. F. Grant (England) in July, 1856, for incorporating with inks and colors used for printing, such oderiferous gums or essential oiks as will impart to printed flowers the same odors as the natural flowers which they represent. In the manufacture of artificial flowers such scented oils may be applied to them with a pleasing effect."
The following good advice is given for extractiong the colors of dyewood:-
"When sugar or oils are subjected to a high temperature they acquire a rusty brown color, but exposure to a low temperature, when these substances are undergoing purification, prevents this ecil. In treating dyewoods to obtain extracts of coloring matter, especially for red, crimson, purple, violet, and such colors, it would be a decided improvement to use a vacuum pan and a low temperature, because Brazil wood and logwood yield a brownish coloring matter at a higher temperature than that at which a clear red or violet coloring matter is obtained."
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