XEROGRAPHY A copying process that uses electrostatic forces to form
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 patterns of dots
or lines that create tone.
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.