Digital BW, The Print

When I adjust the scan histogram of a slice from a CMYK 4-ink purge 
pattern so that the white of the paper is 0% and the black patch is 
100%, I get the following relative reflective densities (0 to 100% 
scale) for the FS inkset:

C = +/- 78%
M = +/- 49%
Y = +/- 33%
K = 100%

As you suggest, your C and M bottles may be mislabled.  The cyan 
position ink is the darkest and the yellow the lightest.  This is why 
I always do a quick swab test on a sheet of printer paper to visually 
check the relative densities before loading up the CIS/CFS. I use a q-
tip or tooth pick if worried about cotton fibers in the ink as a swab.

Jeff Randall



--- In DigitalBlackandWhiteThePrint@y..., "a_pettit_jr" 
<a_pettit_jr@y...> wrote:

> Yes, what I meant to say was that I created an image with areas of 
Cyan, Magenta, and Yellow then did a conversion to B&W via a 
Luminance layer extraction. A histogram analysis yielded the numbers 
shown below.
> 
> > >But, when I did a CMY to BW conversion, I obtained densities of
> > >C = 30 %
> > >M = 68 %
> > >Y = 7 %
> > >B = 100 %