Sigmar Polke, German, 1941–2010, Untitled (Rorschach) (Ohne Titel (Rorschach)), c. 1999, Colored ink in bound notebook, 192 pages, each: 11 5⁄8 x 8 1⁄16″ (29.5 x 20.5 cm), Private Collection, Photo: Alistair Overbruck © 2014 Estate of Sigmar Polke/ Artists Rights Society (ARS), New York / VG Bild-Kunst, Bonn