Ricoh AP 306D [76/77] Printing guideline for ricoh color products 2 1

Ricoh AP 306D [76/77] Printing guideline for ricoh color products 2 1
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Printing Guideline for Ricoh Color Products 2.01
ProÞ le
A proÞ le describes the gamut of a color device. It is used by a color management
sytsem to convert colors from one device color space to another. If it follows the
ICC standard, it is referred to as ICC proÞ le. To specify the purpose of a proÞ le in
a color convertion, combined terms are used, such as device proÞ le, source proÞ le,
destination proÞ le, etc.
ProoÞ ng
ProoÞ ng or simulation means the representation of one printing process‘ gamut
(generally an offset print gamut) on another output device like a color copier, printer
or proofer. Simulation or prooÞ ng can be realised with color management and ICC
proÞ les by applying 2 proÞ les in a row. First the original data is converted to the
Þ nal print process gamut, e.g. by an Euroscale ICC proÞ le, and then it is converted
colorimetrically to the proofer‘s gamut. Soft prooÞ ng means the simulation of an offset
printing process‘ gamut on a monitor.
Relative colorimetric
This rendering intent does exactly the same as absolute colorimetric, but it
additionally compares the white points of the source and destination gamuts and
shifts the colors accordingly.
Rendering Intents
These are methods used by the CMM to map colors from one device‘s gamut
to another. The four methods are perceptual, saturation, relative colormetric and
absolute colorimetric and correspond to the type of document data that is converted,
such as images or graphics.
RGB
Red, green and blue, representing the primary colors of the additive color model,
which is based on light. Adding 100% of each primary color produces white, while
black is the absense of light (0% of red, green and blue). RGB is the color model used
by input devices and monitors.
Saturation
This rendering intent preserves the vividness of colors and preserves saturation
rather than hue. It is commonly used for business graphics, where bright, saturated
colors are more important than relation between colors.
Simulation
See ProoÞ ng.
sRGB
sRGB is one of the standard RGB color spaces, which for example is used by some
Microsoft applications and Ricoh‘s RPCS driver as a standard and which can be
selected in many applications as RGB color space.

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