The artist used smoke to add depth to some of his paintings.
"To make the smoke prints, we rolled up newspaper and built a fire right on the press," he explained of the process. "Then we placed dampened paper over the fire, which of course put out the fire and produced smoke. Then we rolled the paper through the press, leaving the imprint of the smoke on the paper."
From top: Global Village 37-48 (Diptych), 1989; Dramatic Fire, 1989; River Rocks and Smoke: 4-11-90 #1, 1990.