Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "robert49brake" 
<robert49brake@...> wrote:
>
> 
> Hello Alistair, I don't print with a 2100 so I can't comment on the 
1440/2880 issue but I 
> have a comment on the radial gradient and this has come up before 
in other forums.  What 
> is the source of the radial gradient? 

Hi Robert, thanks for your response and apologies for my belated 
reply. The source of my redial gradient was the Northlight Test image 
which can be found here: http://www.northlight-
images.co.uk/article_pages/black_and_white_test.html 

I do get a smooth "bullseye-free" gradient using the cooler curve. Of 
course this curve fires 4 inks (Mk, LK, LM, LC) so one would expect 
some additional smoothness when compared to the warm curve. What I am 
really trying to establish is whether anyone has been able to achieve 
a "bullseye-free" radial gradient using just the warm curve to fire 
only Mk and Lk.

 
> 
> Somewhere inside QTR you can find a document: Ideal Densities for 
Given dMax Values for 
> a 21 step wedge.  I think this is a more useful tool.  You can also 
add your own curves 
> before linearization to smooth the gradient allowing the linearize 
function to have to do 
> only the fine tuning.  Creating the Curves, I believe, differs 
between Mac and QTR GUI.  I 
> have only a tenuous grasp of the concept myself for Macs creating 
them in text mode, but 
> the info is out there and perhaps others can give you a better 
direction.
> 

You are right, that is really what I need to find out how to do. I 
have found the "Ideal Densities for Given dMax Values" document and 
my densities are materially different to the ideals given in that 
document. I need to find a way to fiddle the linearisation or the 
curves to get closer to the ideal densities. 

Can anyone offer suggestions to achieve this?

regards

Alistair Owens
owens@...