Excerpt from A Systematic Survey of the Organic Colouring MattersThe period which has elapsed since the publication of the First Edition of this work in 1894 has been marked by a great development in the coal-tar colour industry. Many of the older dyestuffs and older methods of manufacture have become obsolete, whilst newer processes have been introduced, new intermediate products discovered, and an enormous array of new colouring-matters have been brought into commerce. A complete revision of the text and a very considerable enlargement of the original work was therefore necessary, but whilst the book has been brought up to date, care has been taken to fully preserve its original scope. It is consequently hoped that it will continue to serve not only as a text book for the student of chemical technology, but also as a ready work of reference for Colour Manufacturers, Dyers, Calico Printers, Dye Merchants, Paper Stainers, Patent Agents, and many others concerned with the tinctorial arts.The first section of the book, which deals with the raw and intermediate products of the artificial colour manufacture, and for which the author is solely responsible, has been extended to include the materials and methods of recent introduction. In preparing this section endeavour has been made to render the text as concise as possible, whilst at the same time embodying as full essential details and recent practical knowledge as space would allow. Accordingly only methods of preparation are described which, so far as is known, are in actual manufacturing use, and mention is seldom made of merely laboratory methods (for which the chemical text-books may be consulted) nor of processes which, though formerly employed, have now been abandoned. In like manner only those references have been given which are of most importance technically.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.