Glossary, Continued
X
XEROGRAPHY—A copying process that uses electrostatic forces to form
an image.
Z
ZINC WHITE—A zinc-oxide based pigment that is less opaque than
titanium and lead white.
ZIP-A-TONE —A transparent acetate sheet preprinted with
or lines that create tone.
patterns of dots
ZONE NUMBERS—Numbers and letters on the border of a drawing to
provide reference points to aid in locating specific points in the drawing.
ZOOM LENS—A variable focal-length lens that functions as a telephoto lens
but allows you to select the range of the object magnification.
AI-67
