A. H. Sabin
Published: 2015-07-07
Total Pages: 72
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Excerpt from Theory and Practice of Painting on Metal In 1898 the writer put out a little book of specifications for painting on structural mental, which has been received with considerable favor; but the last edition (of two) is now out of print and it has seemed desirable to reprint the specifications and to add such remarks as further experience the suggested. The specifications themselves are almost unchanged; but some work has recently been done which exceeds in excellence and thoroughness anything heretofore described, and it seems well to given somewhat detailed account of it, which will be done in proper course. Uncombined metallic iron is so rare, as a natural mineral, that practically there is no such thing. It is found chiefly as an oxide, though carbonates, silicates, and other salts abound and in particular the sulphide, pyrite, is very widely distributed. It may be said that the coloring-matter of most of the dark-colored minerals and rocks is mainly iron. Metallic iron is obtained from the ore by using the most powerful chemical agencies and it constantly tends to go back into combination; when it does this by natural means the product is termed rust. Usually rust is hydrated oxide of iron, mixed with more or less carbonate, and often with sulphate, sulphide, chloride, or other salts of iron. The common cause of rust is the action of air containing moisture and acids, especially carbonic acid; and to prevent it we must exclude water and gases. This is very difficult, but has been attempted in many ways. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.