Karl Oskar Blase was born in 1925 in Cologne, Germany. He was a prolific painter, designer, sculptor and exhibition curator. His work included magazine covers, for publications such as Form and Gebrauchsgraphik, stamp designs for the German Postal Service and film posters for companies such as Atlas Films.

Olle Eksell is well known for his advertising illustration, book jackets and playful packaging design. He first studied engineering and later decided to become a graphic artist. He began his career as a window decorator in 1935, and studied under Hugo Steiner between 1939 and 1941.