Xerox 2000 manual glossary, Rosette

glossary

Rosette	The (acceptable) dot cluster formation that is created in four-colour
	images.
RTP	Short for ready to print. A file that has been ripped
Runnability	Describes the ease with which paper moves through the printing press
	or printer. A paper that performs well on the press (dust free, ideal
	moisture content, no curves or waves, trimmed correctly, and trouble-
	free feeding).
S/G	Short for short grain.
Saddle stitch	An automated method of binding where signatures are opened, straddled
	across a metal right angle plate, and stapled using continuous wire.
Saturation	The vividness or dullness of a hue. One of the three characteristics that
	describe colour (along with hue and value). Also called chroma.
Scoring	A way of folding paper using a long, blunt edged rule that presses firmly
	down on a document, causing a crease in the paper. The paper is then
	folded over the crease.
Screen	The lined screen through which images are photographed to create
	halftones. Shooting through the mesh of a screen breaks an image into
	tiny dots.
Screen angles	The angles at which the halftone screens are placed in relation to one
	another to avoid undesirable Moiré patterns.
Screen frequency	How close the lines are in a screen measured in lines per inch. The
	closer the lines of the screen, the smaller the dots, the more dots per
	inch, and the crisper the image. In offset printing, the less the paper
	absorbs and spreads ink, the finer the screen that can be used.
	Newspapers use screen frequencies of 55 to 85 lines per inch. Most trade
	publications use 85 to 110 lines per inch. Coated paper can hold dots
	from a 200 line screen. With waterless printing, the paper can hold dots
	with even finer screen frequencies, however, it is difficult for the human
	eye to discern the difference in resolution above 200 lines per inch.
Screening	The breaking up of the contone image into a half-tone image for colour
	printing. The finer the screen, the more dots per inch, the crisper the
	image.
Scum	Areas on prints that should remain unprinted which take on ink in an
	offset press.
SEF	Short for short edge feed.
Separations	A colour page split into its component colours (for example, cyan,
	magenta, yellow, black and each spot colour). Each separation is used to
	reproduce a particular colour for printing.
Shadow	The darkest areas in an image or photograph.
Sheet	A loose leaf of paper, printed or plain

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