Ricoh GR-C1 Series Service Training page 65

Improved Gray Reproduction (PCL6)
A new setting, "K (Black) per Page", has been added to the
Grey Reproduction feature of the PCL6 driver.
In previous models, when pages including only gray
images are printed in full color mode, the gray images are
printed with CMYK toner regardless of the Gray
Reproduction setting, and those print jobs are counted as
full color.
From this model, when those pages are printed in full color
mode, they can be printed with Black toner only by
selecting "K(Black) per Page", and those jobs are counted
as B&W.
Also, if a document has some color pages and some pages
with gray images and black text, and if "K(Black) per Page"
is selected, the color pages will be printed in full color, and
pages including gray images and black text with black
toner only.
Slide 65
The setting of "K(Black) per Page" is available only when printing from the PCL6
driver.
The image quality of gray images printed with black toner only is slightly different
from when printed with CMYK toner.
Definition of "Gray": Objects that have the same values for R, G and B
components. If the color is similar to grey but the values of R, G and B are not
the same, the image is printed with CMYK toner even if "K(Black) per Page" is
selected.
When "K(Black) per Page" is selected, the productivity may decrease because it
is needed to judge which color components (RGB) are used on the page before
printing.
TCO Reduction
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GR-C1 Training