File:The American annual of photography (1919) (14780431094).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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ay. Color sensitive plates exposed toany sort of red light before exposure are ticklish propositionsat best. Many ruby lights will fog bromide paper, let alonea color sensitive plate, and if you hold a color sensitive plateup to within a couple of inches of a ruby light, and examineit for ten or fifteen seconds, several times during the processof tray development fog is sure to show. Examine the ex-treme ends of your negatives, that were protected by edges ofplate holders; if they are not perfectly transparent you havefog. Do not put your plate cage into the fixing bath and donot fix in the developing tank. The exposure question isenough to keep one busy without having to worry about thecause of twenty or so other troubles that may or may not show. Last and by no means least, is your dark-room light tight?Go in there in the daytime, shut the door, stay for five min-utes, look around and see what you see. The hardware storewill probably sell some felt strips and tacks right away. A 192
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u pq U (-1 Hi<OOi Q < wpqo HOO iz:< plate capable of making a fully exposed negative in i/5oothof a second is not going to stand for very much light throughthe key hole, or under the door. The plate companies are mak-ing some wonderful plates these days; lets give those platesa chance to show what they can do.

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