QTR-Quadtone RIP

ferdinand_paris wrote:
> I decided to recommence the linearisation process.  In doing so I
> realised that part of my problem with darker than expected shadows may
> have been at what point in the process I set the "black boost"
> parameter in the curve definition.  I find the "Calibration.pdf" and
> "Eye-One-ReadMe.pdf" clearer and easier to understand than "User
> Guide.pdf" (sorry Tom), but the user guide is a little more detailed
> on issues like black boost.
> ...

The black boost setting should not be changed after you have applied the 
linearisation. If you do so the curve will need to be re-linearised.

The darker than expected shadows in your print may simply be the result 
of applying the icc profile. Have a look at this message from Roy:

http://tech.groups.yahoo.com/group/QuadtoneRIP/message/4497
(about half way down the page).

When a typical icc profile for matte paper is applied the the whole 
image becomes a little darker and the shadows end up being compressed. 
Watch the histogram in photoshop as you apply the profile.

regards
Howard