Pablo Picasso was a prolific printmaker, producing over 2,400 original prints throughout his career in a variety of techniques. But until 1945, almost all of his prints were black and white, and only a handful of them were lithographs, a printmaking method that closely resembles painting, enabling artists to draw directly on a stone slab or metal plate. This ratio drastically changed when Picasso met the master printmaker Fernand Mourlot. In just under two decades, Picasso and Mourlot produced over 350 lithographs (many of them in color), experimenting with unconventional techniques like finger painting that pushed the boundaries of the medium.