Photochromy
Photochromy is the art or process of reproducing colors by photography. Photochromy is not to be confused with photochromism, a reversible color change induced by light energy. Furthermore, a so-called photochrom–a black-and-white photograph colored by hand using an 1880s method–is not the result of the photochromy process.
History
- Colored images by direct exposure from nature using a Lippmann plate
- Color printing method by the bleach-out process. ''See Utocolor and Cibachrome''