Digital BW, The Print

I have updated our workflows comparison page at InkjetMall

http://www.inkjetmall.com/store/workflow/workflow-differences.html

We now have the visuals on the Jeff Randall workflow. These are not quality
comparisons but rather comparisons which show how the black ink is handled
differently than the PiezographyBW.

I have been asked to do the same for the ImagePrint software as well as the
original CMYK Cone Quads Methodology workflow that was taught at our digital
print workshops prior to the PiezographyBW driver. I will try and get both
these up soon. The Cone quads definitely use a lot of cyan under the black.
We are not clear on how much cyan ImagePrint is using.


Jeff's workflow seems to conserve even more ink that the Woolfe workflow,
yet results in a full tone print. But this workflow is not a good candidate
for use with PiezoTone black either, as it leaves it without much under-ink
support. Piezography Museum Black will be better for both of the RGB
workflows. Portfolio Black will be adequate if fade similar to MIS-FS black
is acceptable. 


Piezography Museum Black

Starting Optical Density        1.68
O.D. After 400 hours Xenon      1.66
Percentage of Fade              01.2%
Delta E                         0.84

% of pigment in formula         100.00%
% of non-pigment in formula     0%
% of Pigment by volume weight   7.20%


Piezography Portfolio Black

Starting Optical Density        1.73
O.D. After 400 hours Xenon      1.65
Percentage of Fade              04.6%
Delta E                         1.48

% of pigment in formula         92.00%
% of non-pigment in formula     8%




--------------------------------
may your highlights be dotless
and your tonal scale smooth,


Jon Cone
jon@...
Piezography(tm) brand software and inks
http://www.piezography.com
--------------------------------