To produce his prints, Frank employs the techniques of etching and watercolor. After the drawing for the print is etched onto the copper plate, it is immersed in an acid bath which bites away at the etched lines. Then etching ink is applied to the surface of the plate, forcing the ink into the etched lines. The inked and polished plate is placed on the bed of and etching press and a damp sheet of 100% rag paper is placed on top of it. The pressure of the rollers embosses the lines of ink into the paper. The process is repeated for each etching. After the edition is printed, Frank then hand colors each print.