Glossary, Continued
O (Continued)
OUTPUT—The end product generated by an electronic device, such as a
computer, printer, or copier.
OUTPUT DEVICE—An electronic accessory to a computer system that
provides some type of end product either visually or as a hard copy.
OUTLINE—The outside edge of a shape or form.
OUTLINE DRAWING—A drawing where lines define the outer limits of
the forms without the representation of modeling, light, or shadow.
OVERHEAD PROJECTION—A projector that uses of a system of mirrors
and a fresnel lens to project a transparent image or object to another surface
or screen.
OVERLAP —To cover a part of one shape or line with another.
OVERLAY—A transparent or translucent sheet taped over the original art
for protection or to indicate instructions or corrections.
OVERPRINTING —Printing an image over another impression.
OZALID MACHINE—An ammonia process printmaking machine that
produces the same-size copy from transparent or translucent originals.
P
PAINTING KNIFE—See PALETTE KNIFE. A type of palette knife made
for applying paint to a picture.
PALETTE—(1) The surface on which the artist places paint and mixes
colors before applying them to canvas or other painting surface; (2) A group
of colors or gray values chosen for use in the same picture.
PALETTE KNIFE—A thin, flexible, steel blade set in a wooden or plastic
handle available in a variety of shapes used for mixing paints and impasto,
applying paint directly to a canvas or to create special textures directly on the
surface of a picture.
Continued on next page
AI-42
