Digital BW, The Print

So you don't have to go through the pushups and so I can be more 
indivdually customised about it, can I do something like what you 
describe below? Except print out the step wedge and bring it to a lab 
with a densitometer that reads CMYK?

I guess a question might be how to vary the cmy to get cool, neutral, 
or warm curves to taste- do you weight the midtones with more color, 
or is it more linear? I'd expect the k values read by the densitometer 
to be more straightforward...or maybe total ink put down expressed as 
a K reading if it can read it like that.

Maybe one way is if I can print out some known good step wedges that 
work with my paper in PS6, then I can read the values and just try to 
duplicate them say at a different dpi or PS7 or workspace 
conversion...whatever.

Does any of this make sense? Maybe I'm just eternally confused by PS7 
hijinks these days...<g>
Jim H.



--- In DigitalBlackandWhiteThePrint@y..., "Paul Roark" 
<paul.roark@v...> wrote:

  It also looks like PS 7 
is
> different than PS 6, though I still do not have a copy of PS 7 to 
see what
> might be going on.
> 
> With the Piezo driver now being separately available, it probably is 
worth
> trying if you're having trouble.
> 
> On the other hand, if you like a variable-tone inkset and are having
> trouble, learning how to tweak the curves makes a lot of sense.  If 
you can
> identify the area of the problem with the eyedropper in the image 
file, then
> make some blocks that are 1% different in that area and add them to 
the
> 21-step test chart, the way the top and bottom 5% have been done 
with the
> posted 21-step test file.  This will allow you to see whether you 
are
> getting a smooth response in the area of concern.  Once you identify 
the
> problem, you can go to the curves and correct it.
> 
> The RGB curve is usually mostly free of points.  (The limited number 
of
> points that Photoshop allows per curve is a problem.)  For very 
small
> wiggles at the ends of the curve, I've been using this RGB curve to 
correct
> the situation.  By putting enough points on the 45 degree line 
(input =
> output) you can hold most of the curve as is while adding a bunch of 
points
> in the area where the problem is.  By doing this you can often get 
enough
> points in the critical area of the graph to do the job.
> 
> Good luck.
> 
> Paul
> http://www.PaulRoark.com