illustration board A heavy pasted board. image carrier Image to be inked and printed. Plates--relief, planographic or intaglio; from plate, cylinder, stone or stencil. imitation hand-made paper Embossed, machine-made paper, finished with special felt rollers to simulate hand-made papers. imposition Laying out of pages in a press form so that they will be in correct order after the printed sheet of paper is folded. impressed watermark Method of producing a watermark by means of a rubber design on a marking roll which presses the mark into the moist sheet as it passes over a press or smoothing roll. Sometimes called a "rubber mark." impression Pressure of type or blanket as it comes in contact with paper. imprint unit Accessory on web presses used to imprint one side of the web with rubber plates. index bristols Manufactured on Fourdrinier machines from chemical wood pulp. Index bristols are characterized by strength, ruggedness and erasability. India paper See bible paper. India tint Light buff or beige color found in printing papers. indirect In printing, ink transfer from image carrier to blanket to paper. Offset presses are indirect printing processes. They consist of plate cylinder, blanket cylinder and impression cylinder. industrial papers Broad term referring to papers manufactured for industrial uses such as packaging, cardboards, tissues and wrapping papers. infra-red copying Absorption of infra-red light by most inks and carbon images. ingrain Synonym for mottled or granite appearance found in some papers. ink absorption Extent of ink penetration into paper. ink fountain Reservoir from which ink is metered to the rollers of a printing press. ink resistance Resistance to the penetration of ink vehicle; ink hold-out. inking Ink is applied by squeegee, immersion or roller. Letterpress and offset presses are inked with rollers. In the gravure process, cylinders are immersed in a formation of ink. Stencil printing usually employs a squeegee. Then there is the electrostatic principal employed in xerography, a form of impactless printing. inkometer Instrument used to determine the stickiness, or tack, essential to the inks used in multicolor printing. The tack must be decreased with each additional color printed to prevent lift-off of colors already applied. intaglio Type or design etched into a metal plate as opposed to raised letters as in letterpress. integrated mill A paper mill which manufactures enough pulp to supply its own papermaking needs. interface In data processing, the point at which two systems or units overlap or meet to link two machines. interleave Accessory sheet between the leaves or parts of a form set. ivory finish Finish obtained by calendering through rolls on which beeswax has been rubbed.
|