This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...an insolubility more or less deep according to the luminous intensity and its duration. It will be easily conceived that the two surfaces of the gelatine film, that is, the upper surface ant' the one adhering to the glass, ju-c in very different conditions, the former being almost totally soluble, excepting ...
Read More
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...an insolubility more or less deep according to the luminous intensity and its duration. It will be easily conceived that the two surfaces of the gelatine film, that is, the upper surface ant' the one adhering to the glass, ju-c in very different conditions, the former being almost totally soluble, excepting here and there where the intensity of the rays lias penetrated tlie whole substance; whereas the exterior surface, as before remarked, is insoluble. The parts between these surfaces are more or less soluble according to the quantity and intensity of the light that has passed through the negative. It will le seen, therefore, from these conditions of things, that the operation if washing, in order to be effectual, ought to be performed on the under surface. The film consequently is removed from the glass and transferred in the following manner: Flow the film on the glass plate with two coats of collodion, and then immerse it in a dish of lukewarm water. The collodion will soon be detached together with the gelatine film, which will float in the water. The film is allowed to remain until all the soluble parts are dissolved off, together with the coloring matter which they contain. By this mode of proceeding the most delicate half-tones remain attached to the collodion, and the image is brought out very perfectly. Whilst in this condition in the water a piece of paper already prepared with gelatine is brought carefully beneath the floating film and then lifted out of the water and stretched upon a board. The film, carefully adjusted on the gelatinized surface of the paper, soon adheres to it, and may thus be dried. Carbon Processes with the Salts of Iron. Without recapitulating all the various processes arisiug out of the use of the salts of iron, ...
Read Less
Add this copy of The Silver Sunbeam: a Practical and Theoretical to cart. $73.71, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2010 by Kessinger Publishing.
Add this copy of The Silver Sunbeam: A Practical And Theoretical to cart. $78.87, new condition, Sold by Booksplease rated 4.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2010 by Kessinger Publishing.
Add this copy of The Silver Sunbeam: A Practical And Theoretical to cart. $78.87, new condition, Sold by Booksplease rated 4.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2010 by Kessinger Publishing.
Add this copy of The Silver Sunbeam: a Practical and Theoretical to cart. $79.74, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2010 by Kessinger Publishing.
Add this copy of The Silver Sunbeam: a Practical and Theoretical to cart. $93.65, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2010 by Kessinger Publishing.
Add this copy of The Silver Sunbeam: A Practical And Theoretical to cart. $93.98, new condition, Sold by Booksplease rated 4.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2010 by Kessinger Publishing.
Add this copy of The Silver Sunbeam: A Practical And Theoretical to cart. $98.78, new condition, Sold by Booksplease rated 4.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2010 by Kessinger Publishing.
Add this copy of The Silver Sunbeam: a Practical and Theoretical to cart. $100.52, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2010 by Kessinger Publishing.
![The Silver Sunbeam: A Practical and Theoretical Text-Book on Sun Drawing and Photographic Printing: Comprehending All the Wet and Dry Processes at Present Known, with Collodion, Albumen, Gelatin, Wax, Resin and Silver; As [Sic] Also Heliographic Engravin](https://www2.alibris-static.com/the-silver-sunbeam-a-practical-and-theoretical-text-book-on-sun-drawing-and-photographic-printing-comprehending-all-the-wet-and-dry-processes-at-present-known-with-collodion-albumen-gelatin-wax-resin-and-silver-as-sic-also-heliographic-engravin/isbn/9781149547489.gif)
