3.2.11.
Gray Excerpt
The color of a dot in a document
(e.g. a MS Word *.doc or a *.html in Internet Explorer) before printing with
EXTIF pro, is called original color. As the
document is usually meant for being displayed on the screen, these original
colors are generally RGB colors.
Equal portions of red, green and
blue result in a neutral gray. As already explained in paragraph
CMYK, in CMYK
color space, especially the darker neutral gray can be
obtained more cheaply and at higher color fidelity by adding a black
(K-channel) portion to cyan, magenta and yellow, than by simply blending C, M
and Y.
All common CMYK color profiles take this into account: They compose for example
fullblack (R=G=B=0%) as the darkest neutral gray, by approximately 90% K, 80%
C, 70% M and 70% Y.
In order to maintain the mix ratios
of neutral gray as they are pre-set by the CMYK color profiles, select option No gray excerpt.
For text documents with embedded colored images, meaning documents with
lots of fullblack pixels but few black-oriented color dispersions, it is
recommended to completely represent
the neutral fullblack (R=G=B=0%) of the original document (C=M=Y=0%) by
K (K=100%) in print output. In this case, please select R=G=B=0% ->
K=100%.
For documents that contain mainly
gray scales, for instance text documents with embedded black-and-white
images or gray scale images, you
can go one step further by completely replacing the entire neutral gray with K.
In this case, please select option R=G=B=x% ->
K= (100-x) %. Example: If a pixel of a document has the original color R=G=B=37%,
then the neutral gray will be represented by 63% K, 0% C, 0% M and 0%Y in print
output.
Especially for smoothed fullblack
writings on a white or neutral gray background, you should use R=G=B=x% ->
K=(100-x)% instead of R=G=B=0% -> K=100%, as in case of a fullblack
excerpt, an undesired Corona surrounding
the letters in the C, M and Y channels would remain.