Xerox 2000 manual glossary, Electrophotography

glossary

Electrophotography	The image transfer system used in printers and copiers where images are
	produced using electrostatic forces. Electrical charges are used to create
	an image on a photoconductive surface to which toner is attracted. The
	toner is then transferred and fused to paper.
Embossing	A process in which paper is pressed between two dies to raise a portion
	of the printed image, creating a three dimensional image on the page.
EPS	Short for Encapsulated PostScript. A file format designed to transfer
	PostScript information between compatible applications. It provides the
	highest quality images available from a PostScript output device.
	Includes a PICT component to allow it to be displayed on a screen and
	to print on a non-PostScript printer.
Fan-out	Distortion of the paper on the press caused by wavy paper edges that
	have absorbed excess moisture.
Finishing	A term used to describe the process a job goes through after printing is
	finished and before the job is distributed. Examples include scoring,
	folding, trimming and binding.
FM screening	A relatively new method for creating halftones. Stochastic screening
	generates equal size dots that appear to be placed randomly. Advanced
	algorithms are used to determine the optimum placement of dots so as
	not to cause visual artifacts (such as moiré patterns). Registration on
	press is slightly more difficult than with lined screens but the colours
	can be very brilliant. The concepts of screen frequency and screen
	angles do not apply with FM screening. Also called stochastic screening.
Folio sheet	A US size for sheets used in sheet-fed offset presses. Images are laid
	out in printer spreads from which they can be later cut and folded into
	booklets, brochures, and so on. Common sizes include 25” x 38", 20” x
	26", 19” x 25” and 23” x 35”.
Form	A signature printed on one side only.
Formation	Describes how paper fibres are distributed on a sheet.
Four-colour	Printing with the four process colours – cyan, magenta, yellow and
	black.
Full bleed	An image that extends beyond all four edges of a page. Because no
	printers are able to print to the edge of a sheet, the edges must be
	trimmed after printing.
Gamut	The range of colours that can be reproduce on a display or printer. Also
	called colour space.
GCR	Short for Grey Component Replacement. A method for replacing equal
	combinations of cyan, magenta and yellow with black.
Ghosting	The undesirable faint repetition of printed images. Can occur in offset
	printing and digital printing.
GIF	Short for Graphics Interchange Format. A graphics file format widely
	used on the internet because of its small file size.

G – 5