Читать книгу Photography in the Studio and in the Field - Edward M. Estabrooke - Страница 19

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We now take up that more important branch of the collodion process, vis., that for negatives.

The formulæ and instructions already given for positives might enable one to make a negative, but the negatives so made would bear even a remoter relation to one made by the formula about to be given than would a positive made according to these formulæ bear to a good one made by the appropriate means. Important modifications are necessary to reach the highest excellence in either process.