A Manual of Photography Founded On Hardwichs Photographic Chemistry
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In our eReader you can find the full English version of the book. Read A Manual of Photography Founded On Hardwichs Photographic Chemistry Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Manual of Photography Founded On Hardwichs Photographic Chemistry
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The best plan is to give a full exposure and to depend on the controlling power of acid in the developer.
The Development is best effected with Pyrogallic acid. The following formulae may be considered good normal solutions which can be modified to suit circum- stances of over or under exposure : (1) Pyrogallic Acid 3 grains Citric Acid 1 grain Distilled Water 1 ounce (2) Nitrate of silver 20 grains Acetic Acid 2 drachms Distilled Water ..... 1 ounce The latent image is apt to fade away altoget...her or at least get weakened unless developed within a few days after exposure. To conduct the development the film is first moistened with water by rinsing it for a minute under a gentle stream, or by placing it for a short time in a dish of clean water. After draining for an in- stant, Solution No. 1 is poured on once or twice and re- turned to the developing cup. Two or three drops of No. 2 are now intimately mixed with the Pyrogallic and the mixture again applied to the film. If the image starts out evenly, clean and bright, 'continue pouring the developer on and off till by transmitted light suffi- cient density is obtained.
What to read after A Manual of Photography Founded On Hardwichs Photographic Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by George Dawson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The best plan is to give a full exposure and to depend on the controlling power of acid in the developer.
The Development is best effected with Pyrogallic acid. The following formulae may be considered good normal solutions which can be modified to suit circum- stances of over or under exposure : (1) Pyrogallic Acid 3 grains Citric Acid 1 grain Distilled Water 1 ounce (2) Nitrate of silver 20 grains Acetic Acid 2 drachms Distilled Water ..... 1 ounce The latent image is apt to fade away altoget...her or at least get weakened unless developed within a few days after exposure. To conduct the development the film is first moistened with water by rinsing it for a minute under a gentle stream, or by placing it for a short time in a dish of clean water. After draining for an in- stant, Solution No. 1 is poured on once or twice and re- turned to the developing cup. Two or three drops of No. 2 are now intimately mixed with the Pyrogallic and the mixture again applied to the film. If the image starts out evenly, clean and bright, 'continue pouring the developer on and off till by transmitted light suffi- cient density is obtained.
What to read after A Manual of Photography Founded On Hardwichs Photographic Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by George Dawson to read onlineMoreLess
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