The Docks at Portsmouth, England

1874 Scientific American  
The following 011 the subject oC anHine color8, from the pen of Mr. P. Kuntz, of Paris, may be useful as a concise reg/1m": The first colors employed were the violets; it was only in 18;}O that aniline red was discovered, and by whom first is lJot clear. Aniline red, rosaniline, or fuchsin is n,)W uRunlly prepared by the mixture of aniline with arseni. c"l acid and water, or aniline and arsenical acid found in commerce in the state of sirup, and which contains suffi. cient water ior the
more » ... ter ior the purpose. Pure rosaniline has scarcely &ny oJ"r. .\�eording to the opinion of Hoffmann, generally ac C!lpt.; I, t·ll" coloring matters produced by the various reo agell(� t,om aniline are all salts of one and the same basi8, the rO�i1niline. The colors of the salts of rosaniline are not p�rmantllt" they will neither withstand ley, 8liap, nor the effdr.t of light; but their base serves in the preparation of ot!:"r ,.J:'Jring matterd which are of great interest. The resinous re�id ue of the preparation of fuchsin, treated with different solvents, gives the chrysaniline, violaniline, mauv aniline, etc. The c�lor recently introduced into commerce under the name of cerise, and the tint of which, less scarlet than that of fuchsin, approaches rather to poppy color, is also obtained from the residue of fuchsin. By treating fuchsin by means of various agents, and in various methods, the most varied tints :Jf red are obtained. One of the colors
doi:10.1038/scientificamerican12051874-354 fatcat:wfsmxzjf2ralzbvahhmsjsoi2e