 ... concerning this last process, but I will state, in a general way, that my best results were obtained by giving the plate such a coating of copper as to change the tone of the picture, that is, give it a coppery colour, and then heating it over a spirit-lamp...  The Civil Engineer and Architect's Journal - Page 79edited by - 1845Full view - About this book
 | 1844 - 508 pages
...copperycolour, and then heating it over a spirit lamp until it assumes the colour desired. I have now an exposed picture treated in this way at the same...impression has not suffered in the least by the oxidation. Should this process be perfected, so as to render it generally available, it will be greatly superior... | |
 | Perry Fairfax Nursey - 1844 - 504 pages
...coppery colour, and then heating it over a spirit lamp until it assumes the colour desired. I have now an exposed picture treated in this way at the same...impression has not suffered in the least by the oxidation. Should this process be perfected, so as to render it generally available, it will be greatly superior... | |
 | 1844 - 576 pages
...coppery colour, and then heating it over a spirit-lamp until it assumes the colour desired. I have now an exposed picture treated in this way at the same...impression has not suffered in the least by the oxidation. Should this process be perfected, so as to render it generally available, it will be greatly superior... | |
 | 1844 - 564 pages
...coppery colour, and then heating it over a spirit lamp until it assumes the colour desired. I have now an exposed picture treated in this way at the same...impression has not suffered in the least by the oxidation. Should this process be perfected, so as to render it generally available, it will be greatly superior... | |
 | William Newton, Charles Frederick Partington - 1844 - 508 pages
...coppery color, and then heating it over a spirit lamp until it assumes the color desired. I have now an exposed picture treated in this way at the same...and it remains unchanged. It is of a beautiful green color, and the impression has not suffered in the least by the oxidation. Should this process be perfected,... | |
 | 1844 - 950 pages
...coppery color, and then heating it over a spirit lamp until it assumes the color desired. I have now an exposed picture treated in this way at the same...and it remains unchanged. It is of a beautiful green color, and the impression has not suffered in the least by the oxidation. Should this process be perfected,... | |
 | William Newton - 1844 - 508 pages
...coppery color, and then heating it over a spirit lamp until it assumes the color desired. I have now an exposed picture treated in this way at the same...and it remains unchanged. It is of a beautiful green color, and the impression has not suifered in the least by the oxidation. Should this process be perfected,... | |
 | 1844 - 506 pages
...coppery color, and then heating it over a spirit lamp until it assumes the color desired. I have now an exposed picture treated in this way at the same...and it remains unchanged. It is of a beautiful green color, and the impression has not suffered in the least by the oxidation. Should this process be perfected,... | |
 | William Henry Thornthwaite - 1845 - 84 pages
...coppery colour, and then heating it over a spirit lamp until it assumes the Colour desired. I have now an exposed picture treated in this way at the same...and the impression has not suffered in the least by oxidation. For pure landscapes, it has a pleasing effect, and by adopting some of the recent inventions... | |
 | John Holmes Agnew, Walter Hilliard Bidwell - 1845 - 604 pages
...coppery color, and then heating it over a spirit lamp until it assumes the color desired. I have now an exposed picture treated in this way at the same...and it remains unchanged It is of a beautiful green color, and the impression has not suffered in the least by the oxidation. For pure landscapes, it has... | |
| |
