ABSTRACT
Casein printing, which utilizes curdled milk to bind the component materials, was patented in 1908 as a technique to use with other photo-printmaking methods, such as Van Dyke brown printing (see Chapter 7). Used by itself, however, casein printing can yield results that are as subtly graded and colorful as the watercolor paints that make up part of the emulsion. The translucency of each color coating permits a new hue in a new layer of emulsion to change the pigment color underneath. One of the least expensive of the handapplied emulsion methods, casein printing is closely related to gum bichromate printing (see Chapter 8), and a reading of that chapter is recommended.
