Rayografie
Griffelkunst Editionsverzeichnis vol. I 212 A4. Signed "Schubert" and dated "1922/78" on verso. Additionally with signature stamp and the stamps "einmalige, vom kuenstler / autorisierte auflage / fuer die griffelkunst" and "rayograph". On baryte paper by Agfa. 29,7 x 22,6 cm (11,6 x 8,8 in), the full sheet
In this work the artist put more or less transparent objects between a light-sensitive film and a source of light, then he exposed them on photo paper, so he didn't use an actual camera. Published by the Griffelkunst-Vereinigung Hamburg 1978. [DB].