Galvanoplastic Manipulations: A Practical Guide for the Gold and Silver Electroplater and the Galvanoplastic Operator ... Based Largely on the "Manipulations Hydroplastiques" of Alfred Roseleur |
From inside the book
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Page 24
... appearance ; but this layer , generally , borrows its strength from the underlying metal , as is the case in gilding or silvering copper , or in coating zinc with copper , etc. Or , we may design to reproduce a given article with ...
... appearance ; but this layer , generally , borrows its strength from the underlying metal , as is the case in gilding or silvering copper , or in coating zinc with copper , etc. Or , we may design to reproduce a given article with ...
Page 32
... appearance of their pieces , it is due to the neglect of this operation , and direct dipping in strong aqua fortis . We shall indicate further on the processes for utilizing and extracting all that can be saved from old aqua fortis and ...
... appearance of their pieces , it is due to the neglect of this operation , and direct dipping in strong aqua fortis . We shall indicate further on the processes for utilizing and extracting all that can be saved from old aqua fortis and ...
Page 38
... appearance , it is desired to impart to the objects a dead lustre , they are , after dipping in aqua fortis and rinsing , plunged into a bath prepared the day previous and composed of— Nitric acid of 36 ° ( yellow aqua fortis ) ...
... appearance , it is desired to impart to the objects a dead lustre , they are , after dipping in aqua fortis and rinsing , plunged into a bath prepared the day previous and composed of— Nitric acid of 36 ° ( yellow aqua fortis ) ...
Page 39
... appearance which is disagreeable to the eye . This objectionable dulness may be cleared up without causing the “ dead ” luster to disappear , by passing the pieces rapidly through the acid mixture for bright dipping pre- viously ...
... appearance which is disagreeable to the eye . This objectionable dulness may be cleared up without causing the “ dead ” luster to disappear , by passing the pieces rapidly through the acid mixture for bright dipping pre- viously ...
Page 40
... appearance , looking like silver , while the color of the former should show but little change . * In this case theory is confirmed by experience , since the exchange of bases takes place between oxides , analogously constituted ( HgO ...
... appearance , looking like silver , while the color of the former should show but little change . * In this case theory is confirmed by experience , since the exchange of bases takes place between oxides , analogously constituted ( HgO ...
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Common terms and phrases
added adherent alkaline alloys amalgam ammonia ammonium anode aqua fortis aqua regia battery become bisulphite boiling bright bronze brush burnished carbonate cast-iron CHAPTER chloride of gold cleansed coating cold color common salt copper or brass cream of tartar cyanide of potassium dead lustre described diluted dipping dissolved distilled water electric current electro electro-deposits electro-gilding Electro-Metallurgy employed filtered fire-gilding formula galvanic galvanoplastic gilders gilding bath glass gutta percha heat hydrochloric acid iron liquid mercury metal method mixture mould nickel nitrate nitrate of silver nitric acid objects obtained operation ormolu ounces oxide pieces plate platinum porcelain powder precipitate preferable prepared proportion pure pyrophosphate quantity rapidly removed require rinsed Roseleur sal-ammoniac scratch-brushed shade silvering bath simple immersion small articles soda sodium solution steel stirring stoneware sufficient sulphate of copper sulphuric acid surface thickness thin tion varnish vessel washed wire zinc
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