Oil Exchange, Bradford, Pa, Pennsylvania, 19th century stereoscope card.

No. 23.

The albumen silver print is a photographic printing process that was widely used in the 19th century. It involves coating paper support with a mixture of egg whites and salt, which creates a glossy surface to hold light-sensitive silver salts. The paper is then sensitized in a solution of silver nitrate, and exposed in a camera or under a negative. After exposure, the print is developed in a solution of gallic acid and silver nitrate, which reduces the silver salts to metallic silver and creates the final image. The albumen print process was widely used for commercial and fine art photography in the 19th century and produced high-quality, detailed images with a distinctive glossy finish.

petroleum industry pennsylvania albumen prints stereographs lot 13660 stereograph cards marian s carson collection library of congress pa west and waddell bradford photo print oil exchange ultra high resolution high resolution stereoscopic views building historic landmarks library of congress

01/01/1860

Library of Congress

https://www.loc.gov/

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