Xerox CX250, CX240 Black is added for optimum effect, Reproduction, Choices or 256 possibilities

Glossary

24 bit/3 byte image	An image can be either RGB or CMY and each of the three colors uses
	1 byte or 8 bits of data. Since 3 bytes equals 24 bits, these images are
	also known as 24 bit images. This system is used for high quality video
	imaging and scanning. For process color printing, a fourth color
	(black) is added for optimum effect.
32 bit/4 byte image	An image that uses 8 bits each for CMYK pixels, or 8 bits for each RGB
	pixel and 8 pixels for a mask layer or other future use. Since 4 byte
	equal 32 bits, these images are also known as 32 bit images. An 8 bit
	CMYK image is the minimum required for high quality print
	reproduction.
4 color printing	Color reproduction method used to create full color output by
	overlaying cyan, magenta, yellow and black inks.
8 bit/1 byte image	An image limited to 256 tones of one color or 256 different colors.
	Since 1 byte contains 8 bits and each bit has two choices, 1 byte equals
	28 choices or 256 possibilities.
Absolute Colorimetric	A rendering intent method similar to Relative Colorimetric except
	that it does not make adjustments according to the white point. In
	this method, colors that do not fit within the output color space are
	rendered at the extremes of the output color space. Colors that fall
	inside the output color space are matched very accurately.
	This method is valuable for representing “signature colors“. Colors
	that are highly identified with a commercial product such as the cyan
	in the Creo logo.
Additive color model	Color system in which the picture is composed of the combination of
	Red (R), Green (G) and Blue (B) light transmitted by the original
	subject. Effective for monitors and TV's but not for print. Scanners
	normally first scan in RGB and it is converted into CMYK for
	printing. See also RGB, CMYK, Process colors, Subtractive color
	model.
Amplitude Modulation	Halftone screening, as opposed to FM screening, has dots of variable
	size with equal spacing between dot centers.