QTR-Quadtone RIP

Zisskar

Regarding use of ICC profiles with QTR:

The Gray and RGB ICC profiles were part of Roy's first attempt at
introducing colour management to B&W printing. For tose without an
densitometer or scanner they are still useful, but not as good as using his
ICC creation utilities.

There is a document in the ICC folder in the QuadtoneRIP folder that
describes how to use the RGB and Gray ICC profiles. In a nutshell, you can
edit your file in PS as you would normally and when ready to print you
convert to this profile before exporting the tif file for printing. This
adjusts the representation of the image to a profile closer to that expected
by QuadtoneRIP. Note that QTR does not use the ICC profile, it simply uses
the image data in file and prints it using the Curve you specify.

You would use the RGB ICC profile if you're image were in RGB format - for
example if you are printing with Qimage. If you have a grayscale image you
would use the gray ICC profile.

There is another document in the Eye-One folder in the QuadtoneRIP folder
that describes how to make your own ICC profiles for use with QTR.

Regarding printing modes

The available modes are determined from the Printing Model and are specific
to the printer. For the 2200 the modes are related to those available in the
Epson driver, except that Super 1440 is unidirectional printing at 1440
while regular 1440 is bidirectional. I'm not sure what 1440x1440. It must be
a specific mode of the R1800.

Tom Moore

> -----Original Message-----
> From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
> Behalf Of zisskar
> Sent: Friday, May 19, 2006 3:21 AM
> To: QuadtoneRIP@yahoogroups.com
> Subject: [QuadtoneRIP] Re: QTR on Epson R800 with UC inkset

[...]

> 
> Thank you Tom,
> your responce seemed to me, like a very warm welcome to the community,
> it was informative and detailed.
> I do have though couple more things to ask, since I've done my read
> and trial & error tests, I happily found that QTR can be used in
> conjuction with Qimage and get the best from both worlds.
> So, I discovered the QTR-gray and QTR-RGB icc profiles to which I
> convert images in CS before sending them to Qimage for upsizing and
> sharpening. Then I print to file a Tiff in RGB, while canceling print
> color manage in Qimage.
> I concluded to this proccedure after reading several posts in both
> forums.
> I still have a difficulty to understand how the embedded QTR icc
> profile, is related to the QTR curves, whether the one overides the
> other.
> Also, what's the theoretical difference between 1440dpi, 1440x1440 and
> 1440 super. I've done some tests and didn't realize any obvious
> difference between them, except for printing time (and more ink I
> presume).
> 
> 
...