Dultgen halftone intaglio process

The Dultgen halftone intaglio process is a specialized technique used in color printing. It's a method for reproducing images with a full range of tones, similar to a photograph. This process involves creating two photographic positives from the original image. One positive is made through a halftone screen, which breaks the image into dots of varying sizes. The second positive is made without a screen. By exposing a carbon tissue first to the screened positive and then to the unscreened positive, the resulting image has dots of different sizes and depths. When etched, these variations in dot size and depth allow for the control of tonal values in the final print. This method is particularly useful for color work in printing.1