The Chemistry and Technology of Paints (Classic Reprint)

Book excerpt: Excerpt from The Chemistry and Technology of Paints The manufacture of mixed paints is essentially American, having been accredited to' some enterprising New Englanders who observed that when a linseed oil paint was mixed with a solution of silicate of Soda (water glass) an emulsion was formed, and the paint SO made showed very little tendency to settle or harden in the package. Several lay claim to this discovery. The first mixed paint was marketed in.small packages for home consumption and appeared about 1865. The addition of silicate of soda is still practised by a few manufacturers, but the tendency is to eliminate 'it as far as possible and to minimize as much as possible the use of an alkaline watery solution to keep the paint in suspension. The general use of zinc oxid has had much to do With the progress of mixed paint, for it is well known that corroded White lead and linseed oil settle quickly in the package, while zinc oxid keeps the heavier lead longer in suspension. Where only heavy materials are used, manufacturers are inclined to add up to 4 per cent of water. Under another chapter on Water in the Composition of Mixed Paints, page 254, this subject will be fully discussed. 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.