He produces graphics of unique quality. His sheets have different etching techniques such as soft ground etching, drypoint etching and aquatint technique. Brassel manufactures the plates by hand and makes his own original etchings.
He attended the graphic school in Bonn and created in oil, watercolor and tempera as well as mixing techniques. The first etchings were made in 1977. The technique of color etching fascinated Brassel especially, so that he perfects them to this day. The exhibition successes he achieves with his works both in Germany and at international art fairs such as in Bologna, Basel, London, New York, San Francisco, Los Angeles, Washington and Tokyo confirm him in his work.