University of Illinois Bulletin, August, 17, 1908, Vol. 5
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| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from University of Illinois Bulletin, August, 17, 1908, Vol. 5: A Cheap Enamel for Stoneware, 1907-1908 The object of this work was to investigate some of the possibilities of producing a cheap enamel, primarily for the improvement of the better grades of stoneware, and secondly, cheap enamels for other purposes at temperatures lower than those required for the stoneware industry. The main object sought for was an enamel which would be whiter and better than the commercial stoneware glaze; something on the order of a tin enamel in appearance, though much cheaper. No special field was plotted for investigation. The method first adopted for carrying out the work was to make up a series of glazes, then select the most promising one, after firing, for the upper member of the next series, and continuing thus. The method of preparing and applying each glaze in this work was the same, so as to obtain an accurate comparison of results in so far as mechanical and physical application was concerned. The batch weight of each glaze was calculated from its respective formula, weighed separately,(500 gm.), ground wet for two hours in a small porcelain ball mill, passed through a 100 mesh sieve, placed in a Mason jar, allowed to settle and the water decanted. Sufficient water was then added in order to "set" the glaze at 1.5 B. & L. hydrometer (equal to about 48 to 52 Beaume). Each glaze was then ready for dipping. Trials were made from ready prepared stoneware clay from Monmouth, 111. A test showed that the clay when made into slip form readily passed a 60 mesh screen but left quite a residue of dark colored granular particles on the 100 mesh screen. 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.
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