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will be different because of the different properties of the
toner.
Device-independent color is specified absolutely, in a color
coordinate system that is independent of any device. For
example, if red is specified in a device-independent color
space, two printers will always produce the same result,
even though they may need to combine different amounts of
cyan, magenta, yellow, and black toner. Printers that
produce device-independent color are calibrated to precise
color standards.
Black and White
References
Device-dependent color specifications are based upon an
arbitrary range of values for each primary color component.
The range endpoints for each color component are called
black and white references for that component. Colors
relative to these predefined limits are derived by specifying
the amount of each component.
For the Device RGB color space, the maximum limit is
called the white reference and the minimum limit is called
the black reference. Regardless of the number chosen, the
white reference represents the maximum value of a
primary color that a device can produce, and the black
reference represents the minimum value of that primary
color. For example, if 100 is chosen as the white reference
for red in the RGB color model, it represents the reddest
red the device can produce. If 10 were chosen instead, then
10 would represent the same red.
Example: Assuming the white and black references are set as follows:
Scenario 1
White Reference Black Reference
red = 63 red = 0
green = 63 green = 0
blue = 63 blue = 0
1-4 Color Printing Overview1-4 Color Printing Overview