Digital BW, The Print

Carl

OK ignore the fact that I also printed it with an LK/LC/LM curve (although this was 
done simply by only using the 3 inks - limit K=0 - with UC-Neutraliser which creates 
a virtual ink mix in the proportions set under the ink limits 27/27/56 - set the 
number of gray parts  to 1 and LK = 100 in the and you can see how the "cooled LK 
mix" looks across a step wedge - I didn't bother linearising etc because I just wanted 
to see the hue of LC/LM/LK mixed in those proportions).  I simply printed the file 
using the cool curve and then again with the warm curve - I was simply wanting to 
have a reference page as to how each curve printed the step wedge.  The change is 
very abrupt with a clear straight right edge and then consistent tone from there to the 
left edge.  To the right of where this effect occurs is an even tonal change down to 
white but beginning a good notch lower (ie no other bands). This is why I thought the 
left most 4mm (the amount by which the 100% block exceeds the size of every other 
block except the 0%) was not on the scale.  But then I would expect the printout to 
gradually darken from right to left so that the dmax was reached 4mm in - just as it 
appears on the screen.  But there is a clearly visible increase in density on both 
printouts.  The middle and bottom parts of the step wedge (where the image is 
stepped) show consistent tone from the right side of the 100% step to the edge of the 
page).  If you print the file you should very easily see the effect I am seeing - or 
perhaps not at all in which case I have something screwy going on.

Cheers

Steve


 --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield <scho@m...> 
wrote:
> Steve,
> 
> I'm not sure I follow what you did, but If you made a curve with just 
> LC/LM/LK and then printed a step wedge with this profile it might look 
> strange because you have no K.  I haven't used the 21 step.psd file 
> with the wedge you mentioned so I don't know how it prints with these 
> profiles.  I just wonder if the bands you are getting are from 
> posterization.
> 
> Carl