reinhold koehler décollage positiv-negativ i 1960 décollage with cardboard 64.7 × 49.8 cm2′ 1 8⁄16″ × 1′ 7 10⁄16″ signed and dated inquire hide name email text hello, i am interested in the work "décollage positiv-negativ i" by reinhold koehler. could you please provide information about this work and its availability. thank you is part of the exhibition paper positions berlin 2025