Photograms of flowers by Lou Landauer (1897–1991), which Thomas Ruff had acquired, as well as his work on the Photogram series, gave him the idea of working with another photographic technique that has been used since the mid-nineteenth century: pseudo-solarization, also known as the Sabattier effect. This is a technique discovered by chance, with which, during exposure in the darkroom, the negative/positive is exposed to a diffuse second exposure, resulting in a partial reversal of light and shadow areas in the photographic image. Ruff first digitally photographed flowers or leaves arranged on a light table. During the subsequent processing on the computer, he applied the Sabattier effect. Similar to the Photogram, he uses contemporary means to refer to an “old” photographic technique and shifts the limits of its possibilities.