The American annual of photography (1914) (14593560220)

Autor:

Helmar Lerski

(Internet Archive Book Images)

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Identifier: americanannualof28newy (find matches)
Title: The American annual of photography
Year: 1914 (1910s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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About This Book: Catalog Entry
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Text Appearing Before Image:
THE TWINS. EDITH L. WILLIS. If a lantern plate has been rather under exposed a goodaccelerative is Hypo I oz. Water 25 oz. using from 3 to 20 minims of hypo solution to each ounce ofmixed developer. According to Capt. Abney exposure can be reduced one-third by use of the hypo solution, but it is better to avoid itsuse if possible. Ferrous Oxalate has no fogging effects, as it only acts onthe silver that has been affected by the light. The Iron Solu-tion does not keep well and should be kept in small bottleswith waxed corks. The mixed developer also does not keep 88
Text Appearing After Image:
PORTRAIT. Helmar Lerski. well, therefore fresh developer is always desirable. If thewater used contains lime there will be a precipitation whichwill be cleared in the Acid Clearing Bath. The Iron developer is the developer for old stale plates asit will not produce markings or stains. All traces of Pyro must be kept away from the Iron devel-oper or black stains or markings will result from the combina-tion of Pyro and Iron salts. Keep a set of dishes for IronOxalate alone. In mixing Oxalate of Potas. Solution let stand twenty-fourhours and decant off clear liquid for use. An alkali reactionmeans a bad quality of Oxalate and is unfit for use.

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• Source book page: https://archive.org/stream/americanannualof28newy/americanannualof28newy#page/n128/mode/1up

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