Xerox 2000 manual glossary, Impressions per hour

glossary

Impressions per hour	The term most commonly used with offset printing for measuring print
	speed. One impression can consist of multiple images on a large sheet
	that will be cut into smaller sized sheets after being printed.
Impressions
per minute	The term most commonly used with offset printing for measuring print
	speed. One impression can consist of multiple images on a large sheet
	that will be cut into smaller sized sheets after being printed.
In-line finisher	A finishing device, such as a folder or stitcher, that is directly
	connected to a digital printer. Paper moves directly from the printer into
	the finishing device.
iph	Short for impressions per hour.
ipm	Short for impressions per minute.
JPEG	Short for Joint Photographic Experts Group. An industry body that has
	defined a standard for digital compression of image graphic files. The
	file size is directly proportional to how much data is discarded.
Just-in-time printing	Documents stored digitally and then printed in the exact quantity
	required at the precise time required.
Knockout	When printing a shape or type in colour, the shape is printed by
	eliminating all background colours. This results in a pure colour against
	the paper.
L/G	Short for long grain.
Lamination	A sheet covered with a thin layer of polyester (laminate) to yield a
	strong and washable surface.
Lead edge	Feed edge of the paper.
Leaf	Consists of two pages (front and back of a sheet) in a comb bound or
	wire bound book.
LEF	Short for long edge feed.
Lightfastness	The degree to which a printed page will resist colour changes when
	exposed to light.
Lightness	The darkness or lightness of a hue. One of the three characteristics that
	describe colour (along with hue and saturation). Also called value.
Lines per inch	A measure of resolution, especially with halftone screens. The number of
	lines, or rows, of halftone dots per linear inch. See screen frequency.
Long edge feed	The longest edge of the paper is fed into the printer first.
Long grain	Paper in which the orientation of fibres is parallel to the long edge of
	the sheet. For example, in an A4 sheet, the fibres of a long grain sheet
	are parallel to the 297 mm dimension of the page.
Lookup table	A reference file used to convert images from one colour space to
	another, such as converting RGB pixels into CMYK pixels for printing.

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