File:The American annual of photography (1912) (14765892505).jpg

Identifier: americanannualof1912newy (find matches)
Title: The American annual of photography
Year: 1912 (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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watermarked, and the mark sometimes comes in a very objectionable spot on the print. When developing prints for brown tones, better effects can be obtained by using papers of cream or yellowish shades. I have gotten some very sat-isfactory prints on such a toned paper called Beaufort antique laid. As to sizing, I have never yet used a paper that it was necessary to size, about all the papers on the market being sufficiently sized. Sensitizing kallitype is a really simple process, and when the chemicals are pure the ultimate prints will be absolutely successful. Of the great number of sensitizing formulas pub-lished from time to time, I have found that used by Mr.Henry Hull the most reliable. I have always used Merck's chemicals. The following chemicals comprise the really necessary ones,and the quantities named are what I have found the most economical to purchase. Iron oxalate, ferrip, scales 4 oz. Iron and potassium oxalate, crystals i oz. Silver nitrate i oz. Oxalic acid, crystals i lb. 184
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THOMAS WATERS. Harry Hendrickson. Potassium bichromate 4 oz. Ammonia, 26° i lb. Carbonate soda, dry i lb. Rochelle salts i lb. Borax i lb. Sodium acetate i lb. Tartaric acid 4 oz. Phosphoric acid, 50% 4 oz. The two iron salts first mentioned should be absolutely pure and fresh. The first step is to make up the sensitizing stock solutions, which are four in number. Use distilled water in each case. No. I—Water 20 oz. Iron oxalate 4 oz. Gum Arabic y^ oz. Pour the water in a deep orange-colored bottle or stone jug,add the iron salt. Shake occasionally during the course often minutes and set away for 24 hours. The salt should then be perfectly dissolved and the liquid clear and of a deep amber color. Then add the gum arabic, and shake occasionally to dissolve. No. 2—Water 16 oz. Iron and potassium oxalate i oz. Keep in a deep orange bottle. Add the salt to the water and shake occasionally till dissolved. No. 3—Water 4 oz. Oxalic acid ^ oz. Ammonia, 26° ^ oz. Have the water of a temperatu

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