Digital BW, The Print

Paul answered all my questions and fixed my typo/spelling error


> >what's happening in the fader...?
>
> >Admittedly several steps causing error
> >but I get 3X3 eyedropper readings of your fade scans:
>
> I use a 5x5 pixel width for the eyedropper for quick looks.  For better
> accuracy, select a large area within a patch and use the Histogram (in the
> Image drop-down menu) mean reading.
>
> >FS faded black RGB 21-18-13
>
> >FS-N faded black RGB 14-13-8
>
> The difference is probably that the FS was done with the 1160 and the FS-N
> with the 3000.  The 3000 puts down slightly more black ink.  (There can
also
> be ink and paper batch differences and differences depending on the mood
of
> the printer on the day in question ....  For the control and test strip
for
> a particular ink, I always print them on the same piece of paper and at
the
> same time.)
>
> When comparing the test strips, be sure to compare the faded ones only to
> their control strips.  There are density differences that have nothing to
do
> with fading or warming.


Using the histogram method
I get similar results:

FS faded black RGB 21-19-13

FSN faded black RGB 15-13-9

and a much smaller Standard Deviation in the FSN
using similar size selections.

Its been a long while since I used Press Ready
to create separations but I believe there's still
some cyan ink even at 100% black
with those partitions...?

I am guessing this undercolor cyan acts as
a support for the black.

This may "fix" the main fading problem area I
have seen with the piezo inks in and around 85%-95%.

Even with different printers I think if it were k only
you'd see closer results but...?

Thanks
Bob