How do Canon printers use different black inks?

Started Jun 4, 2006 | Discussions thread
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aVolanche
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How do Canon printers use different black inks?
Jun 4, 2006

In the various Canon printer that use 3 or more C M Y inks plus 2 black inks(BCI-6BK + BCI-3eBK),what determines which black(or a mixture of CMY) is used?I got an email from Canon which doesn't fully explain(I don't think).Anyone know the details?How does ckecking "grayscale" box affect this?Thanks!

Canon's email:
"It is both dependant on what is set up in preferences and what is being
printed. If the preferences are set to standard and plain paper, and
what is being printed is text, then the bci-3eBK is used. If the
preferences are set to standard and plain paper and what is being
printed is graphical in nature, the black section is made up of a
composite of the colors. If High Quality and any of the photo papers
are selected, then the BCI-6BK gets used for black printing".

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