The book of Photography Practical Theoretic And Applied
The book of Photography Practical Theoretic And Applied
Paul N Paul Nooncree Hasluck
The book The book of Photography Practical Theoretic And Applied was written by author Paul N Paul Nooncree Hasluck Here you can read free online of The book of Photography Practical Theoretic And Applied book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The book of Photography Practical Theoretic And Applied a good or bad book?
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In a similar way, the stripped film may be made smaller instead of larger, by treatment with for- malin followed by alcohol, or in a lesser degree by the use of methylated spirit. In this case, the image is intensified. REDUCTION OF FOGGED NEGATIVES. When fog is present in a negative that is also too thin, the best treatment is to use the ferricyanide reducer for the removal of the fog, afterwards well washing and then intensifying. The ferricyanide should not be very strong, and the negative s...hould not be immersed for longer than is found 144 THE BOOK OF PHOTOGRAPHY. necessary to clear it. For the removal of dichroic or colour fog, Abney's ferric chloride formula is recommended, as given on p. 140. A little retouching medium on a soft silk rag, applied with gentle friction, is frequently efficacious, or methylated spirit may be used. These, however, are of use only when the dichroic fog is merely a surface deposit. REDUCTION AND TONE VALUES. It has been shown that the gradation of a negative may be greatly altered both by reduction and by intensification.
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