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Colored

photographs, colors and process

COLORED PHOTOGRAPHS.—By colored photographs is meant the production of photo graphs colored by artificial means, and not the making of photographs in natural colors—a process not yet accomplished except by very unsatisfactory means.

There are various methods of coloring photographs which may briefly be divided under two headings—the application of color to the surface of the print, and its application behind the photographic image. The art of harmoniously coloring photographs is one that is only acquired by practice and natural artistic abilities. Many text-books upon the subject have been published, which the beginner should study to become acquainted with the mechanical part of the art.

The process of coloring at the back was one that was adopted with the old alabrastine process, and a "penetrating varnish " was used which had the effect of rendering the colors visible upon the contrary side.

The late W. B. Woodbury invented a method of producing colored photographs, or photo chromographs as they were called. Photographic prints produced by the Woodburytype were transferred to paper supports previously painted or colored with the necessary pigments, which, seen through the thin film containing the image, possessed the appearance of colored photo graphs, and in many cases closely resembled delicate oil paintings. A similar effect can be

produced by the carbon process.

Another method of producing colored photographs with very delicate effects is by fixing a paper photograph upon a cushion shaped glass with transparent cement. When this is dry, two thirds of the paper support of the photograph are rubbed away with sand-paper, and the remain ing part made transparent with melted paraffin wax. Transparent colors are then applied, which appear very soft when viewed from the front. A second coating of paraffin wax is then applied, and the heavier colors laid on. Another layer of wax is then applied as a protective coat.

Carbon prints may be colored with oil, water, or powder colors. Before coloring with oil colors, the print should be sized with a solution of isinglass dissolved in equal parts of hot water and spirits of wine.