8 jul 1802 año - Mezzotint is a very beautiful but time-consuming technique, which was most popular in the 18th and 19th centuries for portraiture and reproducing other works of art. In creating a mezzotint, first the entire metal plate is roughened by marking fine lines into the plate in all directions with a rocker Tones are created by burnishing or scraping into the plate (Cinta de tiempo)