Image Area - The
actual area on the printed matter that is not restricted to ink coverage.
Imagesetter - Laser output device using photosensitive
paper or film.
Imposition - Arrangement of pages on mechanicals
or flats so they will appear in proper sequence after press sheets
are folded and bound.
Impression - (1) Referring to an ink color, one
impression equals one press sheet passing once through a printing
unit. (2) Referring to speed of a press, one impression equals one
press sheet passing once through the press.
Impression Cylinder - Cylinder, on a press, that
pushes paper against the plate or blanket, thus forming the image.
Also called impression roller.
Imprint - To print new copy on a previously printed
sheet, such as imprinting an employee's name on business cards. Also
Ink Balance - Relationship of the densities and
dot gains of process inks to each other and to a standard density
of neutral gray
Ink Fountain - Reservoir, on a printing press, that
Ink Holdout - Characteristic of paper that prevents
it from absorbing ink, thus allowing ink to dry on the surface of
the paper. Also called holdout.
Ink Jet Printing - Method of printing by spraying
droplets of ink through computer-controlled nozzles. Also called
Inner Form - Form (side of the press sheet) whose
images all appear inside the folded signature, as compared to outer
In-Plant Printer - Department of an agency, business
or association that does printing for a parent organization. Also
called captive printer and in-house printer.
Inserts - Within a publication, an additional item
positioned into the publication loose (not bound in).
Intaglio Printing - Printing method whose image
carriers are surfaces with two levels, having inked areas lower than
noninked areas. Gravure and engraving are the most common forms of
intaglio. Also called recess printing.
Integral Proof - Color proof of separations shown
on one piece of proofing paper, as compared to an overlay proof.
Also called composition proof, laminate proof, plastic proof and
Interleaves - Printed pages loosely inserted in
ISBN - A number assigned to a published work and
usually found either on the title page or the back of the title page.
Considered an International Standard Book Number.