File:Portrait of a young girl, by Fedora E D Brown.jpg

Identifier: americanannualof3334newy (find matches)
Title: The American annual of photography
Year: 1919 (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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f storing it when itis not to be used immediately. As the tissue dries, it manifestsa decided tendency to curl, coated side in, and may becomedifficult to manage. It is therefore well to take it down beforeit becomes absolutely bone-dry, and clamp it in a printing-frame until ready to use it. This necessity may be avoided byan alternative method of drying, namely, to squeege the tis-sue, after taking from the sensitizer, on a clean ferrotypeplate, and allow it to remain on the plate while drying. Thismethod has several advantages over the other, aside from thefact that the tissue dries flat, for it also dries with a high gloss,which facilitates printing and transferring, and, the surfacebeing kept from the air while drying, the lights are purer,showing less degradation. Of course, drying takes longerwhen the ferrotype plate is used, so this method should notbe adopted except in dry weather. Care should be taken to seethat the ferrotype plate is absolutely clean, as grease or other 192
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PORTRAIT OF A YOUNG GIRL. Fedora E. D. Brown. extraneous matter may cause the tissue to refuse to strip whendry, or to refuse to adhere to the transfer paper. The writerhas never found special drying cupboards to be necessary. Printing. The ordinary tissues, sensitized in the mannerdescribed, are about the same speed as P. O. P., and the print-ing time may be determined by making a rather Hght proof onSoHo or Kresko—printing proof deep, not deep enough fortoning—and noting the time required. If the tissue is thenprinted for the same time, this will be found correct, except inthe case of the mezzotint tissues, which should be printed buthalf this time, and of the Ivory Black tissue, which should beprinted for three-quarters the proofing time. Fortunately, car-bon has considerable latitude in development and a slighterror in printing is of no moment. As has been said, carbonrequires a strong light, such as sunlight or an arc forprinting, and the writer finds a twin-arc, having a spe

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