Platers' Guide, with Which Is Incorporated Brass World PDF Download
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Author: Hardpress Publisher: Hardpress Publishing ISBN: 9781314261561 Category : Languages : en Pages : 530
Book Description
Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
Author: Hardpress Publisher: Hardpress Publishing ISBN: 9781314261561 Category : Languages : en Pages : 530
Book Description
Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
Author: UNKNOWN. AUTHOR Publisher: Forgotten Books ISBN: 9781331939252 Category : Technology & Engineering Languages : en Pages : 528
Book Description
Excerpt from Brass World and Platers' Guide, Vol. 10: A Journal Devoted to the Art of Refining, Alloying, Casting, Rolling, Founding, Electroplating of All the Non-Ferrous Metals Gilding is a gold-colored mixture of copper and zinc and consists of 90% of copper and 10% of zinc. It has a gold color, although not as rich as pure gold or its alloys, of course. It is used when an imitation of gold is required and there are many instances in which it employed such as, for example, in the manufacture of cheap jewelry. Bronze is a gilding mixture with the addition of a little tin and the favorite mixture is 90% copper, 9% zinc and 1% tin. For the majority of purposes, however, the straight gilding answers equally as well and is generally employed. A number of other mixtures of bronze are used, of course, depending upon the use to which they are to be put. Ordinary bronze for rolling, however, is the mixture previously given. Use of Silver Cyanide in Making Silver Plating Solutions. Silver cyanide is now used very extensively for making up silver plating solutions, even more so than formerly, as the majority of silver platers are beginning to appreciate its advantages. The use, therefore, can be said to be increasing. There are three silver compounds that are being employed in making a silver plating solution in conjunction with potassium or sodium cyanide. 1. Silver nitrate. 2. Silver chloride. 3. Silver cyanide. The use of silver nitrate has almost become obsolete although there are a few platers who still use it and obtain good results. It was the first silver salt used that was recommended. Its objection lies in the fact that, when dissolved in cyanide, sodium or potassium nitrate is formed by the reaction which fills the solution with an inert compound. This however, is apparently not directly objectionable as it appears to have no deleterious effect, contrary to the usual opinion, upon the deposit. The real disadvantage is in filling the plating solution with the sodium potassium nitrate which acts as so much foreign matter. As far as the silver chloride is concerned, this is still quite extensively used and by some of the largest manufacturers of silver plated ware. One of the largest, if not the largest has always used it and still employs it. Their work is of the highest grade. The objection to it, however, is that it fills the solution with inert sodium or potassium chlorides when it is dissolved in cyanide. The reason why it has been and is still used, is that it is much easier to make than the silver cyanide. Any solution that contains silver and is acid or neutral in reaction may be precipitated by the addition of common salt or hydrochloric acid and an excess of these precipitants will not redissolve the silver chloride formed. It may be understood, therefore, that silver chloride is the easiest silver compound to prepare. This is particularly true in the case of the large silverware concerns which have stripping solutions, etc., to which it is only necessary to add salt or hydrochloric acid to form the chloride of silver, and it is so easy to make it is not surprising that it was early used as the silver salt for making up a silver plating solution. The advantage of the silver cyanide lies in the fact that, when dissolved in cyanide no inert salt is formed but the double cyanide of potassium or sodium and silver is produced. This gives an ideal solution for silver plating and one which is theoretically correct. The solution may show a lower specific gravity than other solutions made from the chloride or the nitrate and still have more silver in it. This fact means that the solution will remain in good condition longer than the other solutions and will stand "building up" better. The objection to the use of the silver cyanide has been one of making it. To produce the salt a neutral solution of silver nitrate is required and to it is adde
Author: Erwin S. Perry Publisher: Forgotten Books ISBN: 9780267750610 Category : Technology & Engineering Languages : en Pages : 484
Book Description
Excerpt from The Brass World and Platers' Guide, 1909, Vol. 5: A Journal Devoted to the Art of Refining, Alloying, Casting, Rolling, Founding, and Electroplating of All the Non-Ferrous Metals One of the firmly rooted beliefs in the brass industry has been that copper alloys. While red hot are not affected by quenching in water. This idea undoubtedly originated from the fact that steel. Containing over a certain percentage of carbon. Is hardened by such treatment. As brass and other copper alloys are not sensibly hardened by quenching. It has been assumed that they are not affected or altered in any way. Fig. 1. Test Bars of hot-rolled aluminum-bronze Before and After Quenching. Those with Irregular Fracture are the Quenched Bars. 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.
Author: Publisher: Forgotten Books ISBN: 9780331605136 Category : Technology & Engineering Languages : en Pages : 542
Book Description
Excerpt from The Brass World and Platers's Guide, Vol. 11 Glue for use in the plating room should be well boiled, and the wheels, after cleaning off the Old glue and emery, must be sized with a thin mixture of glue and hot water and after drying, coated with the regular glue or rolled in emery. 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.
Author: Hardpress Publisher: Hardpress Publishing ISBN: 9781314261547 Category : Languages : en Pages : 474
Book Description
Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
Author: Hardpress
Author: Hardpress
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Author: Erwin S. Perry
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Author: Hardpress