Digital BW, The Print

The following was published on the Piezography3000 users list.
Because so  many users in this group use these workflows I though this 
should be of  interest to them. Make sure to click on link. The pictures ar=
e cool.

Brian





Subject:  PiezoTone Original Black and Workflows

An important tech bulletin has been produced that has information
which will affect users of workflow procedures. It is located at

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

This page illustrates the dramatic differences in how PiezographyBW
plugin and the Woolfe workflow handle the printing of a monochromatic 
image.We have used colored inks so that you can easily see the
differences in the processes.

PiezographyBW plugin is a simple quad process which uses overlapping
bell shaped curves of yellow, magenta, and cyan followed by a very short
black printing. The processing of tone follows from weakest dilution
through  strongest dilution.

The Wolfe Workflow curiously enough, works in an opposite manner. The
weakest dilution (or yellow position) is used under the black and the
main tone is carried almost exclusively by cyan.

We have just received this week, our first printed samples of prints
which show rapid fading in the PiezoTone Original Black. Also, thankfully
the artist submitted her workflow process which we duplicated on the
files on the tech bulletin page listed above.

We obviously do not use workflow procedures because we specialize in
quad black workflows at Cone Editions Press. Simple Quads were first
developed   by Cone Editions for IRIS Graphics in the early 1990s and we 
have never had  to use an RGB driver to produce a quad black print. We do 
not know if all  workflow procedures follow the idiosyncrasies of the Wolfe=
 
Workflow. But we do know without any doubt, that users of these workflow 
need to understand more about how their workflows may be affected by, or 
may affect the use of the inks they choose.

PiezoTone Original Black is not a similar formula to the PiezoTone
gray positions which are comprised of pure pigment without any other
colorants or density agents not comprised of pigment. This is why the 
PiezoTone gray positions are so light resistant. PiezoTone Original Black i=
s
comprised of carbon pigment and metal complex. The metal complex 
produced a very dark black optical density which was unique to these inkset=
s 
and which would fade at a rate to that which the original ink set produced =
in 
the black position. On the other hand, with the workflows, this density fad=
e is 
not supported by anything other than yellow and small amounts of cyan and 
magenta.

MuseumBlack is made in the same way as the PiezoTone gray positions.
That is, it is made of pure pigment. It should be used instead of the
original black if users insist on workflows. However, the cost of the
PiezographyBW plugin in so inexpensive now, that workflow users should 
really consider its  use.

We are thankful for the one single user who was considerate enough to
send us printed results and workflow process. It makes all the difference
in the world when users who are having problems send in specific examples 
of their problems to us along with associated work files.


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


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