These are portraits in one color on porcelain, glass or any hard material that has first been coated with gelatin and then photographed on. First treat the whole surface with pumice stone as directed for the bromide paper, afterwards go over it with the crayon and cotton. Then put in the cloud effect in the background, and clean off the lights in the face, hair, and clothes with the eraser; next put in the half-shadows with the peerless stump; then with a solution of India ink darken the stronger shadows throughout the portrait—in the eyes, nose, mouth and eyebrows, and finally in the hair. Finish the face with the No. 0 crayon and the 4 H. Faber's lead pencil according to directions given for finishing bromide enlargements. The Faber pencil is used almost exclusively throughout the face. Very nice effects of strong light can be made on porcelain by scraping through the gelatin surface with the knife. This process is specially adapted to making pictures of smaller size, say 10×12, or 11×14 inches, as it produces a very soft and delicate effect.

[B] For photographic process, see the American Annual of Photography and Photographic Times Almanac, 1888.