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 University of Leeds
and
Arthur Ernest Everest, D.Sc., Ph.D., F.I.C., of the Wilton Research Laboratories; Late head of the Department of Coal-tar Colour Chemistry; Technical College, Huddersfield
Longmans, Green and Co.
39 Paternoster Row, London
Fourth Avenue & 30th Street, New York
Bombay, Calcutta, and Madras
1918
Kaikki kuvat (kemialliset kaavat) puuttuvat // None of the illustrations (of chemical formulas) included.
The groups [KUVIA PUUTTUU] are of considerable interest in connection with both the artificial and naturally occurring colouring matters. They form the basis of a number of synthetic colours that have been in commercial use for many years, of which the following may be cited as typical instances: [KUVIA PUUTTUU] Pyronin G, Eosin A., Tetramethylrosamine, Rhodamine B., Coerulein - whilst related to these, but of less value, are such products as the succineins and sacchareins.
The result of recent researches upon naturally occurring colouring matters has been that a large number of substances, the anthocyans, colours of great beauty and widely distributed in nature, are now known to be derivatives of the benzopyranol complex; indeed all the products of this group as yet investigated are derived from the following nucleus [KUVA PUUTTUU] by the introduction of further hydroxyl groups.
Interest in this type of compound is increased by the fact that compounds related to the anthocyans have been synthetically prepared which have rather more useful tinctorial properties than those possessed by the natural colours, and it is not impossible that the number of commercially useful derivatives in which the y-pyran nucleus is present may be further increased by work that may follow upon the recent researches in this field.
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