The artist draws with a steel needle on a copper plate covered with an acid resistant varnish. Then the plate is immersed in acid and the design is etched. Next the varnish is removed, a printing ink is pushed into the etched grooves. Now the inked plate is placed on a copperplate press and the artist makes the print on a sheet of paper.
The prints – named also "etchings" – have a limited number (usually to 30 exemples).
They are all numbered and signed by the artist.