NEGATIVE, PHOTOLITHOGRAPHICA film negative having a
translucent image and a black background produced by a process camera and
used primarily to make printing plates.
NEUTRAL COLOR(l) A color that lacks hue and intensity; (2) A color
that contains some amount of its complementary; (3) An earth color.
NIBA point at the end of a pen or marker.
NOISEAdding a random pattern of pixels over an image to add texture,
create a new value, or give a painterly effect.
NORMAL LENSAlso called STANDARD LENS. A 50mm focal-length
lens, which most closely approximates normal vision with minimal distortion.
OBLIQUE PROJECTIONA view produced when the projectors are at an
angle to the plane of the object illustrated.
OCTAGONA figure having eight sides.
OFFSET LITHOGRAPHYSee LITHOGRAPHY. Lithographic printing
where an inked plate prints on a rubber blanket, which then offsets the image
to paper stock.
OFFSET SECTIONA section view of two or more planes in an object to
show features that do not lie in the same plane.
OIL PAINTAny pigment ground in linseed oil or poppy oil.
OILSTONEA stone or abrasive used to sharpen needlepoints and blades.
ONE POINT PERSPECTIVEAlso called PARALLEL PERSPECTIVE.
When the height and width of an object are parallel to the plane of projection.
ONION SKINAlso called MANIFOLD PAPER. Thin, translucent paper
used to make a typewriter carbon copy or to serve as a tissue overlay for
work requiring correction or protection.
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