QTR-Quadtone RIP

Qu.1:  This thread started buy asking what type of file to drop onto
QTR-Create-ICC[-RGB].exe. I have a related question.  I print the
target and measure it and I get a text file from the MeasureTool.  I
drop this target onto QTR-Linearize-Data.exe to get the linearisation
data.  So far so good.  

But if I want to create an ICC profile, is it this exact same text
file that I also drop onto QTR-Create-ICC[-RGB].exe?  Or is it a
second text file that I get from printing and reading a target printed
*WITH* the newly derived linearisation data? 

I've read the three pdf help files and trawled the archives, and this
point is not entirely clear to me.  They read like I should use the
first text file, but when reading the very useful file "ICC Info.txt"
by Roy in the files section, it suggests that ICC profiling is in
effect profiling the QTR driver.  This suggests to me that I should be
using the second text file derived from printing a target using a
linearised curve, non?


Qu.2:  I created both grey and RGB ICC profiles and stored them in the
correct folder, but when I opened Photoshop I saw only the grey
profile.  I discovered that this is because although the two profiles
have different file names, they have the same internal profile name. 
Is this intentional?  I would have thought that the RGB profile would
have "-RGB" appended to its internal name.  


Qu.3  How many people are printing via Qimage, and are using its CM
options to convert to a QTR profile, and how many others are doing
profile conversion prior to reaching Qimage?  

By way of background, I was around when Roy & Mike first got Qimage
recognising QTR ICC profiles, but have been largely absent from the
debate since then.  Like Ernst, based on experiments that I did at the
time, I tend not to trust Qimage's CMS for B&W.   I've re-read the
archives in this forum on this topic, and particularly from around the
middle of the year.  It seems to have a lot to do with rendering and
BPC.  The quote from Roy below seems important. Is it as simple as
using BPC for the generic QTR profiles, and not using it for custom
profiles?

Ferdinand

--- In QuadtoneRIP@yahoogroups.com, "Roy Harrington" <roy@...> wrote:
>
> (I should mention that the generic QTR-Gray Matte/Photo Paper 
> profiles were done as XYZ matrix profiles and do not have the BPC 
> builtin -- they depend on the CMS).
> 
> Roy