All lithographs were produced on lithographic limestone printing plates on which the drawing was done by hand. A stone often took over a week to prepare for printing. Each print was pulled by hand. Prints were hand-colored by a dozen or more women, often immigrants from Germany with an art background. They worked in assembly-line fashion, one color to a worker, and who were paid $6 for every 100 colored prints. The favored colors were clear and simple, and the drawing was bold and direct.