Olivetti D-COLOR P26 - Manual (Page 70)

Colour matching> 70
P
URE BLACK TEXT
/
GRAPHICS
When your document is printed, often the pure black colours will
not be printed using 100% black toner. Instead, these pure black
colours are sometimes converted and printed using a mixture of
CMYK toner.
Using the Pure Black Text / Graphics feature ensures that 100%
black text or graphics in your document is printed using pure
black toner.
This means that the following colours in your documents will be
printed using only 100% black toner:
RGB Red = 0, Green = 0, Blue = 0
CMYK Cyan = 0%, Yellow = 0%, Magenta = 0%,
Black = 100%
C
OLOUR MATCH PRECISION
When the printer performs colour matching, it must do many
calculations to convert between different colour formats (RGB,
CMYK, etc.). These calculations can take time to process.
The [Colour Match Precision] option allows you to choose
between higher quality colour matching (more time consuming)
or faster but less accurate colour matching.