ABSTRACT
This chapter provides details of the techniques that make gumoil a unique photographic printing process. It is gumoil's capacity for rendering polychromatic prints that makes the process most special. This takes nothing away from gumoil monochromes, which can be very satisfying for particular images. A two-color print begins as a monochrome. The potential variations in making a basic two-color print are enormous when one contemplates a palette with infinite combinations and permutations of color and concentration. Laying down three or more colors is no different than laying down two. The application of three colors simply means that a bleach etch bath is used between each of three colors, and usually, a final etching bath and wash are used after the last color to bring out remaining highlights. Fairly vigorous brushing of the print after the third color layer soaks in the etch or the wash may be required to free up the last of the gum traces.
