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Image area - Portion of paper on which ink can appear.

Imagesetter - a device commonly found at prepress shops or printers that takes digital information from a RIP and renders type, line art, and photographs onto film or photographic paper. Such companies as Linotype-Hell, AGFA, Scitex, and DuPont manufacture Imagesetters.

Imposition - refers to the arrangement of pages on a printed sheet, which when the sheet is finally printed on both sides, folded and trimmed, will place the pages in their correct order.

imPRESS - a page description language developed by Imagen and supported by over 60 software products including Crystal, TeX, Superpage and AutoCAD. Almost certainly the first commercially available PDL.

Impression - Putting an image on paper.

Impression cylinder - the cylinder of a printing machine which brings the paper into contact with the printing plate or blanket cylinder.

Indicia - Postal information placed on a printed product.

Insert - an instruction to the printer for the inclusion of additional copy.

Ink fountain - The reservoir on a printing press that holds the ink.

Interface - the circuit, or physical connection, which controls the flow of data between a computer and its peripherals.

Insert - a printed piece prepared for insertion into a publication or another printed piece.

International paper sizes - the International Standards Organization (ISO) system of paper sizes is based on a series of three sizes A, B and C. Series A is used for general printing and stationery, Series B for posters and Series C for envelopes.

Interpress - Xerox Corporation's page description language which was the first such product to be implemented. At present the language still has to be adopted commercially by a third party.

ISBN - International Standard Book Number. A reference number given to every published work. Usually found on the back of the title page.

Italic - type with sloping letters.

Ivory board - a smooth high white board used for business cards etc.