IBC
Inside back cover.

IFC
Inside front cover.

Image Area
The portion of paper on which ink and print can appear. 

Imposition
Arrangement of pages so that they print correctly on a press sheet and are in proper order when the sheets are folded.

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.

Imprint
To print new copy on a previously printed sheet, such as imprinting an employee's name on business cards. Also called surprint.

Index Bristol
A relatively thick paper stock; basis size---25 1/2 x 30 1/2.

Indicia
Pre-approved postal markings printed on mailing envelopes to replace the stamp.

Industrial Papers
A term used to denote papers such as janitorial, sanitary, or heavy packing papers.

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 jet printing.

Inserts
Extra printed pages inserted loosely into printed pieces.

Intaglio Printing
Printing method whose image carriers are surfaces with two levels, having inked areas lower than non-inked 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 single-sheet proof.

Iridescent Paper
A coated stock finished in mother-of-pearl.

Italic
Text that is used to denote emphasis by slanting the type body forward.