Glossary

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I

Roman numeral for 1.

ID

Inside Diameter.

IDLER ROLLERS

Roller mechanisms on converting machines used to support, smooth or direct the web in its course of travel through a machine. Not driven.

IML

In-mould Label. A label which is not pressure sensitive, but is placed inside a plastic mould before the plastic is blown, not extruded. The label has a heat responsive adhesive, and when plastic is blown into the mould, it breaks down momentarily, and the label becomes part of the article.

IMPREGNATE

To saturate or permeate a material with a substance.

IMPRESSION

The image transferred from the printing plate to the substrate or the adjustment required to affect the same.

IMPRESSION CYLINDER

In printing, the cylinder on a printing press over which the material feeds to the impression from the inked plate.

IMPRESSIONS

Imprints generally caused by defect on core or bad splice, etc. Can show up for many meters on certain materials.

IMPRINTING

Technique in which changeable copy is added to blank or previously printed labels, tags, etc., with a secondary printing device such as an imprinter, computer printer, typewriter, etc.

INCH - See JOG

A unit of imperial measurement. 1" = 25.4mm. Often used to refer to computer imprinting as ‘6 lines per inch’, etc.

IN-LINE PRESS

A press coupled to another operation such as sheeting, die cutting, creasing, etc. A multi-colour press in which the colour stations are mounted horizontally in a line.

IN-MOULD LABELS - See IML

INDEX HOLES - See FEED SLOTS

INDEX PUNCH - See FEED SLOTS

INFEED NIP

A mechanism designed to control the forward travel of the web into the press.

INFRARED

Type of heaters used for drying.

INFRARED LIGHT

Refers to infrared rays, the longer wave lengths below the red in the spectrum. Used as a source of heat. Note: Infrared rays are usually visible as light from a infrared heater, but not when drying is used.

INHIBITOR

A compound (usually organic) that retards or stops a chemical reaction such as corrosion, oxidation or polymerisation.

INITIAL RELEASE

A release test run immediately after coating and laminating of pressure sensitive labelstock. Refer NS for test procedure & LM specification sheets.

INITIAL TACK

Degree of stickiness when a pressure sensitive label is first applied to the product. Refer NS for test procedure & LM specification sheets.

INK BLEED

Penetration of one colour of ink into the facestock in such a manner as to cause one colour to run or discolour either the background colour of the facestock, or another colour of ink that is laid down adjacent to the colour that is bleeding. Refer NS.

INK FOUNTAIN

Device which stores and supplies ink to the inking roller in a controlled manner on a printing press.

INK HOLDOUT

Describes the degree to which pigment and binder stay on the surface of a material; a function of the ink, material and solvent (or chemical) interactions.

INK PAN - See INK FOUNTAIN

INK PUMP

Electric or air driven mechanical pump that circulates an ink or coating from a holding tank to the ink fountain.

INTERNAL BOND See COHESIVE STRENGTH

Refer NS & LM specification sheets.

INTERNAL STRESS

Stress created within the adhesive layer by the movement of the adherends at different rates or by contraction or expansion of the adhesive layer. Refer NS for test procedure & LM specification sheets.

ION DEPOSITION

Also known as NON-IMPACT PRINTING. A method of printing using a non-impact electronic image process. Ink or dye is blown onto labels, or transferred as an inkjet, or as a powder.

IR-SCANNABLE

Capable of being read by an infrared scanner.

IRRADIATION

Treated with ultra violet light or another high energy ray.