The Photographic Instructor for the Professional And Amateur
The Photographic Instructor for the Professional And Amateur
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In our eReader you can find the full English version of the book. Read The Photographic Instructor for the Professional And Amateur 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 The Photographic Instructor for the Professional And Amateur
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, or with any of the standard formulae for developers.
124 THE PHOTOGKAPHIO INSTKUCTOK.
For line work, when a negative in black and white only is desirable, and when no half tones or modulations are to be preserved, we resort to the ferrous oxalate developer described in the Lesson on " Printing on Permanent Bromide Paper. '' For that class of work, time of exposure is even more import- ant than for ordinary copying, as by a probable reinforcing, or long-continued developing, the sharpness of l...ines is often considerably damaged, making the negative utterly worthless if a relief plate is to be made from it. Keferring to the formula described before, we take three ounces of the solution of oxalate of potash and add to it one ounce of the solution of sulphate of iron. If more iron is used, the mixed solution will turn turbid and separate a yellow precipitate ; in such a state it should not be used. The perfectly clear and trans- parent red solution is poured over the plate, and the appear- ance of the image closely watched.
What to read after The Photographic Instructor for the Professional And Amateur?
You can find similar books in the "Read Also" column, or choose other free books by W I Lincoln Washington Irving Lincoln Adams to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
, or with any of the standard formulae for developers.
124 THE PHOTOGKAPHIO INSTKUCTOK.
For line work, when a negative in black and white only is desirable, and when no half tones or modulations are to be preserved, we resort to the ferrous oxalate developer described in the Lesson on " Printing on Permanent Bromide Paper. '' For that class of work, time of exposure is even more import- ant than for ordinary copying, as by a probable reinforcing, or long-continued developing, the sharpness of l...ines is often considerably damaged, making the negative utterly worthless if a relief plate is to be made from it. Keferring to the formula described before, we take three ounces of the solution of oxalate of potash and add to it one ounce of the solution of sulphate of iron. If more iron is used, the mixed solution will turn turbid and separate a yellow precipitate ; in such a state it should not be used. The perfectly clear and trans- parent red solution is poured over the plate, and the appear- ance of the image closely watched.
What to read after The Photographic Instructor for the Professional And Amateur?
You can find similar books in the "Read Also" column, or choose other free books by W I Lincoln Washington Irving Lincoln Adams to read onlineMoreLess
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