[John Cadwalader, head-and-shoulders portrait, facing slightly left] / F. Gutekunst, Philadelphia.

Stamped on verso: F. Gutekunst, 712 Arch St., Philadelphia.

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.

cadwalader john albumen prints cabinet photographs portrait photographs john cadwalader john cadwalader portrait gutekunst philadelphia history of philadelphia 1855 pennsylvania head and shoulders portrait 19th century frederick gutekunst photo ultra high resolution high resolution man library of congress

01/01/1855

Library of Congress

http://www.loc.gov/

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