An icon (from Greek "image") is an image, picture, or representation; it is a sign or likeness that stands for an object by signifying or representing it.
Illusionism, in art, a kind of visual trickery in which painted forms seem to be real. It is sometimes called trompe l'oeil [Fr.,=fool the eye]. The development of one-point perspective in the Renaissance advanced illusionist technique immeasurably. It was highly developed in the baroque period; Caravaggio's bowls of fruit included insects to enhance verisimilitude.
Impasto is a technique used in painting where paint is laid on an area of the surface (or the entire canvas) very thickly, usually thickly enough that the brush or painting-knife strokes are visible. Paint can also be mixed right on the canvas. When dry, impasto provides texture, the paint coming out of the canvas.
Impressionism was a 19th century art movement that began as a loose association of Paris-based artists, who began exhibiting their art publicly in the 1860s. The name of the movement is derived from the title of a Claude Monet work, Impression, Sunrise (Impression, soleil levant), which provoked the critic Louis Leroy to coin the term in a satiric review published in Le Charivari. Characteristics of Impressionist painting include visible brushstrokes, open composition, emphasis on light in its changing qualities (often accentuating the effects of the passage of time), ordinary subject matter, and unusual visual angles. The emergence of Impressionism in the visual arts was soon followed by analogous movements in other media which became known as Impressionist music and Impressionist literature.
Intaglio is a family of printmaking techniques in which the image is incised into a surface, known as the matrix or plate. Normally, copper or zinc plates are used as a surface, and the incisions are created by etching, engraving, drypoint, aquatint or mezzotint. Collographs may also be printed as intaglio plates. To print an intaglio plate the surface is covered in thick ink and then rubbed with tarlatan cloth to remove most of the excess. The final smooth wipe is usually done by hand, sometimes with the aid of newspaper, leaving ink only in the incisions. A damp piece of paper is placed on top and the plate and paper are run through a printing press that, through pressure, transfers the ink from the recesses of the plate to the paper.
The degree of purity or brilliance of a colour.