QTR-Quadtone RIP

Parker Smith <parkersmithphoto@...> wrote:

> **
>
>
> I'm coming back to Eboni6 ... for the 2400 ...
>
> After reading Paul's various documents on the K3 printers with the
> Eboni/HP combo, I think I want to set up my 2400 with a straight Eboni6
> approach and no HP inks.
>
1) Would there be any problem with simply filling the unused C and LC carts
> with the yellow dilution just to have something in there, or does that
> matter?
>
I recommend the LM and M inks for your LC and C positions, respectively.
 These will duplicate what is already in your setup, but they would have
several useful functions.  First, they are similar in density to the HP
inks that were in those  positions in my 7800-EbHP setup <
http://www.paulroark.com/BW-Info/7800-EbHP-2013.pdf>.  That should allow
profiles from the 7800 setup to be very close to correct in terms of their
printing densities without any basic changes needed, aside from the
recommended re-linearizations.

Second, having the LM and M inks installed there would allow the Epson
driver, preferably with an ICC made with QTR's Create ICC-RGB, as an
alternative workflow to the rip.  From some applications, it's  handy to
have the Epson driver produce decent images.

Additionally, the two additional inks can be used for greater smoothness
(though they are not normally needed).


>
> 2) I plan on making a profile using Paul's "EbHP13-HPR-Eb6.qidf" as a
> starting point, removing the linearization numbers, printing a new 21 step
> test and reading that with a densitometer to relinearize. Does that sound
> like a good strategy?
>

The basic settings are probably close between the 2400 and 7800.

For the LC and C (duplicate ink) positions, you can set them up as "copy
curve" inks or "toners."   You cannot have duplicate density inks in the
same partition (like "gray" partition).   The EbHP profiles are set up with
"toners."  Note  that when there is a second "channel" of an ink like  a
toner or "copy curve" position  the ink limits are reduced.  For example
with a "copy curve" duplicate, you can simply cut the ink limits for the 2
inks in half, since  there will now be 2 inks firing instead of 1.  The
existing EbHP profiles have done this when there is an HP ink in there as a
"toner."  So, you can probably just leave them in the profile  as is.  The
LM and M inks, as  mentioned above, are probably similar enough to the HP
inks in density  that the profile will work fine as is, with
re-linearization recommended.

Good luck with the transition back to carbon from silver.

If you want a neutral appearing, non-OBA print, be sure to try Epson Hot
Press Natural.

Paul
www.PaulRoark.com <http://www.paulroark.com/>


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