[Scene on the Columbia River at the junction with the Pend Oreille River with outcrop in the foreground]

In: Photographs of British Northwest Boundary Survey, 1858-1861.

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.

british north american boundary commission rivers columbia river albumen prints landscape photographs fall river scene columbia river junction pend oreille pend oreille river outcrop foreground 1861 19th century photo ultra high resolution high resolution library of congress

01/01/1861

Library of Congress

http://www.loc.gov/

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