Medical Definition of functional. 1a: of, connected with, or being a functionâcompare structural 1b: affecting physiological or psychological functions but not organic structure functional heart disease a functional psychosisâcompare organic 1b. 2: performing or able to perform a regular function.
Known for Four Apostles woodcuts, engravings and Melencolia interest in Italian concepts Albrecht Altdorfer German painter, engraver, and architect of the Renaissance. Regarded to be the main representative of the so-called Danube School setting biblical and historical subjects against landscape backgrounds of expressive colors.
Etching is part of the intaglio family (along with engraving, drypoint, mezzotint, and aquatint .) The process is believed to have been invented by Daniel Hopfer (circa 1470-1536) of Augsburg, Germany, who decorated armor in this way, and applied the method to printmaking.ike etching, aquatint technique involves the application of acid to make marks in a metal plate. Where the etching technique uses a needle to make lines that retain ink, aquatint relies on powdered rosin which is acid resistant in the ground to create a tonal effect.