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QTR-Quadtone RIP

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QTR calibration mysteries

2009-02-25 by damored1

Hi all,

This week I bought an Epson 4000 printer and have it running via Mac
OSX.4 and Photoshop CS3. I also downloaded QTR and have been impressed
by the many endorsements of so many respected photographers and printers.

Now, the problems I'm having, are at the very start. Firstly, the
Calibration.PDF is extremely sparse in the information given, and
assumes an awful lot, for what is essentially a proprietary system.
There is no step by step guide to clearly explain what setting should
be applied and where.

The problems I've encountered, are as follows...

1]  When setting up to print out the ink separation psd, after
choosing QTR 4000 as the printer, do I apply the profile of the paper
that I'm printing on? 

This is not made clear. All it says is on Page 1 that it must not be
colour managed. It is possible to turn off colour management using the
Epson driver

At the bottom of the profile list there are the QTR gray settings...
are these only to be used when up and running, past the calibration
stage, or should one be used in calibration? If so, which one?

2] The colours on the Ink separation file are cyan background, with
ink 1, Black, being shades of blue, while all the other inks are all
magenta, with Ink 2, Cyan, being slightly blue/purple tinged than the
rest.  In the Calibration pdf, it says... "The colours of the file
will look strange..." How exactly?  The comment should be qualified by
at least a description of what to expect. 

The print that I got was certainly strange, looking nothing like the
file I saw on the screen. The background colour is magenta, which
would lead me to think there's a double profile problem somewhere. The
actual blocks printed, were also in places multicoloured, with blues
and yellows printed alongside greens and a large block of orange on
the light magenta and light black ink strips. 

To properly illustrate this, I'm enclosing links to what I describe
above. First is the file as supplied by QTR to be used for calibation.
http://www.hotlinkfiles.com/files/2316406_w9ydd/inkseparation.jpg
Is this what everyone else has?

Secondly, this is what printed out for me. Radically different from
what was expected...

http://www.hotlinkfiles.com/files/2316407_yk65k/QTR-ink-pattern.jpg

Is this what's meant by the colours being strange? Some blocks still
had the ink far too heavy and still sitting on the page. This was
photographed when it was dry. The quality is not wonderful here, but
it is purely to show the colours I'm talking about

The situation is further confused by the fact that the images on Page
2 and 3 show what are a normal step pattern using all inks.

More questions to come when I've got some answers for this.

Thank you

Damo

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