File:The American annual of photography (1917) (14597305870).jpg

Identifier: americanannualof1917newy (find matches)
Title: The American annual of photography
Year: 1917 (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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nterest, one of which, I think, is exceedinglyvaluable—i.e. the hydrochinon. But to begin with—buy your chemicals of a supply house,but get them to get known brands. Eastman is as good as any—possibly a little cheaper for the same grade—and see thatyour chemicals are C.P. It is an outrage to have anythingelse, anyway. When one walks ten miles to get a picture andthen has it spoiled by some of the terrible messes that are soldas photographic chemicals,—well, weve all done or will do it,and the state of mind is too well understood to make it neces-sary for me to say anything about it. Get Kodak chemicalsand youll not go wrong. HydrochinonAdd I gram of Sodium bisulphite (dry) to 90 cc of water(distilled if you can get it). When dissolved add 2 gramshydrochinon. Now add 90 cc more of water, dissolve 4grams anhydrous sodium sulphite and 2 grams potassiumhydrate (in sticks purified with alcohol) or 1.5 gms. of sodiumhydrate (in sticks as above). When dissolved add to the first 128
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PEGGY WOOD. John Wallace Gillies. solution containing the hydrochinon and filter. The water isbetter hot than cold and better distilled than tap. When it iscold bottle with rubber stoppers, and have the bottles full. Itwill keep well and is a most satisfactory developer. It mayneed a little bromide when used with velox or cyko and some-times does with bromide papers. When used with papers, itis best used about i part developer to i of water. For platesor films it may be diluted as necessary, but bear in mind thatthe image will appear very quickly and probably will requiresome little time to build up. The following formula will be found very good for Hydro-chinon without metol. Water 850 cc Hydrochinon 6.5 grams Sodium Sulphite 30 grams Sodium Carbonate 100 grams Potassium Bromide (saturated solution) 20 to 30 dropsThe image comes up immediately but time of developmentshould be about one minute. Pyrocatechin On the chance that some one may be in touch with a smallstock of this excellen

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