Etchings were created as a way to add illustrations to books in the 16th century...and the "technology" has changed very little.
A metal plate is coated with an acid resist and the image drawn with a tool to expose the metal beneath the drawn lines.
The plate is immersed in an acid bath and the lines of the drawing are etched below the surface of the plate. Ink is applied to the plate, the surface wiped clean, and a sheet of dampened rag paper laid on the plate and run through the press.
I add a touch of color when the etching has dried.
Each print is considered an original; then signed and numbered