Sketchbook: "Perforations" Leopold Hirsch Museum Düren 'Papierkunst' ("alle Objekte perforiert aus Papier and Pappe")

Blue marker on paper

black ink, gouache, silver- and gold-colored paints, graphite, on cardboard, varnished

Graphite on paper

Black marker on paper

Graphite on paper

Metalpoint on white prepared paper

Black crayon on paper

Colored marker on paper

Graphite on paper

Colored marker and opaque watercolor on paper

Graphite on paper

Colored marker on paper