Hello Hendrick,
I hope this helps.
- First, I am not familar with dual K inkset described by Paul Roark. But you mention that you printed at 50% limits on HPR 308, which is a coated MK paper, and as-such should yield Lmin of approximately 17.7 to 16 (Dmax ~ 1.6 to 1.7) using single MK. So you may want to look into, perhaps increase ink limit to >50% or use "Black Boost" ~70%
- Please refer to picture below on how to set the density of lighter shade of grey inks. Mind you this is only for 3 shades of grey (K, LK, and LLK) as an example. Toner inks utilize the density numbers also, but rely on "Limit" to determine how much of the toner gets used. You that either visually, or ideally with a spectro.
- Say at the calibration ink density, the solid blue line represents density of K in 5% step file. Solid orange line represnts LK ink, and solid green line is LLK ink. What you want to do is to find Lmin of LK and LLK (dashed orange and green lines respectively), and find the patch of K which prints at the same density. In the case of LK (orange vertical dash) gives you ~25%, and LLK (green vertical dash) gives you ~15%. These are the numbers you input into "Density." If I undersand your graph, it seems you are looking at these numbers from succesive lower density inks. That would not be correct. All densities should be relative to K.
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Dear all:
I am a beginner and I have a question regarding the determination
of the ink densities to be used under the 'Ink Setup' tab when
using multiple gray inks.?
O.k., Paul Roark calls it a 'judgement call'. With my very
limited experience I fully agree. But regardless of that I would
like to better understand the procedure which I found in several
documents. Accordingly, the ink density to be entered under 'Ink
Setup' should be the result of the product of the fractions of the
respective next darker ink which would yield the same density (or
Lab L) as the ink at 100%.
I measured the Lab L values from a print of the calibration image
for Hahnemühle Photo Rag 308, the GCVT ink set of Paul Roark,
resolution 2880-super and 50% global ink limit. The results for
each ink are shown as circles in the image below.? All data can be
well represented by exponentially decaying functions (lines).
If I follow the above mentioned standard procedure, the fractions
are indicated by the labelled plusses and the densities to be
entered under 'Ink Setup' are represented by the K values below
the full diamonds (they do not lie on the K-curve, because the ink
curves are not linear). Am I correct that these densities, i.e.
products of fractions, should be used? I am asking, because the
products of the fractions, although they certainly carry relevant
information, have no obvious meaning which would help to visually
understand the resulting ink curves.
Hendrik
PS: From the curves in my ink separation plot, is the global ink
limit I selected (50%) adequate? The lighter inks still have a
significant slope at 100%.
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Thought you would appreciate
Thought this group would appreciate this comparison. Started the classic cyanotype unit a week ago and several students’ prints came out as the one on the left so I ASSUMED the P900 profile I translated
to the P5370 would not work. I scrambled to make a new profile on the fly. ?BEFORE I saw their negatives.
?
Then I looked at the negative (and Print-Tool settings) and realized the student had not pulled down the profile so printed the negative with None (no profile) and so did the students after him, since Print-Tool
defaults to last used settings, did the same.
?
There’s always something in a gang lab. The classic cyanotype P900 on the P5370 profile works fine. And I bet those students will pay more attention next time.
?
Of course, they now have a detailed handout.
Chris
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Re: Piezography Pro Inks- UV densities
Perfect!
Thanks Richard!!
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Re: presets, settings and illusions
Thanks for this. Very informative. ?[BTW the current version DXO Photolab 8 creates four presets for the Epson 3880, but gets the names reversed for matte and photo papers.]
*
A question for those of you who are more knowledgeable than I am regarding Sequoia /Print panel/ Printer Options/ Printer Settings:
What does “Finest Detail” actually do?
I usually turn it on except for impressionist or atmospheric images, since it just sounds like a good idea for detailed images.
But, I’m don’t think I can see any difference when Output Resolution is set at 1440 or 2880. ?Seeing is, of course, what it’s all about, but still I wonder whether it actually
does?anything to what ends up on the paper at these resolutions.
Myron
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Hello
?
They are not the same problem.
?
You can learn more about the presets problem here:
?
?
Tracy
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Being new to MacWorld I understand that one should not use Mac AirPrint:
?
I wonder if this essentially is the same as the Preset problem that was mentioned earlier?
?
Should I get an old M1 to use alongside my brand new Mac Studio, so that I can use Monterey?
?
best regards,
Lars Molte Jakobsen
?
Fra: Cheryl <cheryl@...>
Til: QuadToneRIP <[email protected]>
Cc: QuadToneRIP <[email protected]>
Dato: l?rdag d. 1. februar 2025 kl. 02:42 CET
Emne: Re: [QuadToneRIP] New (old) Mac
Thanks, Roy! I found this explanation:?
?
And today, had a zoom meeting with Ray Bidegain. We worked it out. Frustrating, but so glad to know what to do. Ditch the AirPrint driver. The step-by-step is in the link above.
?
Regards,
Cheryl Hanna-Truscott
www.HannaTruscott.com
On Jan 31, 2025, at 10:52, Roy Harrington via groups.io <roy@...> wrote:
Really I mean make sure you are not using the AirPrint driver -- it can exist.
Trouble is that the default name is identical with Epson driver.
Roy
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Thanks, Roy! I found this explanation:?
And today, had a zoom meeting with Ray Bidegain. We worked it out. Frustrating, but so glad to know what to do. Ditch the AirPrint driver. The step-by-step is in the link above.
Regards, Cheryl Hanna-Truscott www.HannaTruscott.com
toggle quoted message
Show quoted text
On Jan 31, 2025, at 10:52, Roy Harrington via groups.io <roy@...> wrote:
?Really I mean make sure you are not using the AirPrint driver -- it can exist.
Trouble is that the default name is identical with Epson driver.
Roy
|
Really I mean make sure you are not using the AirPrint driver -- it can exist.
Trouble is that the default name is identical with Epson driver.
Roy
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... You also have to NOT have the AirPrint driver installed.
Roy Wow! Maybe that is the reason I was beating my head against the wall last week helping a woman here in town get her P900 set up for doing DTP. No matter what we tried, we could not get the Epson Media Installer to communicate with the printer. I am pretty sure that we also had the Epson AirPrint version of the driver installed on her laptop. Fortunately, we were able to print by just using the poster board setting on the front of the printer and make sure they matched with the Print Tool print settings. … Clay
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I'm not sure why there are troubles with the "front poster board" feed.
But on the P900 it's very important that the feeds and the exact paper size agree
on both the printer panel and in the driver software. QTR has the feed in the QuadToneRIP dialog
and the Epson driver has it on the Paper size selection. You also have to NOT have the AirPrint driver installed.
Roy
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Re: Piezography Pro Inks- UV densities
Measured on pitorico ultra premium at an ink limit of 100 and 80, and from the ink side and the base side (measuring from the ink/emulsion side always gives higher readings)
?
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Hanna?
?
I called Epson Support which didnt yield any results, but while I was waiting for them to gt back to me I uninstalled and reinstalled the Epson driver for OS 10.14 a couple of times and it now works great. ?It even saves the presets. I haven't used QCDN V3 yet, but I am confident that it will work and my SpyderPrint as well. It is an extra step when I want to print, but I feel that this is going to save me a lot of time and frustration in the long run.
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Larry- I have an Epson p900 and have the same issue with the front poster board feed so please share your advice from Epson if you will. Thanks. Cheryl Hanna-Truscott www.HannaTruscott.com
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On Jan 30, 2025, at 06:49, Larry Huhn via groups.io <lehuhn@...> wrote:
? I am running the new simpler V3, but I will let you know if I have issues.
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I am running the new simpler V3, but I will let you know if I have issues.
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Tracy
For the past year it seems that every time I try to print digital negatives or a gravure plate I have to spend several hours resolving some issue created by an update to the print driver or Apple OS. MY “hope” is that by running a separate system for all my QTR, QCDN, and Print Tool functions I can avoid those issues. The preset issues are annoying but I can deal with that. It is the constant updates that have had me considering giving up the whole “hybrid workflow” at times. If this doesn’t work out I am only out $100 for the MacBook.
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I spent most of yesterday setting up the new (old) MacBook running Mojave. I installed QTR, QCDN V3, SpyderPrint and the Epson drivers. Most of the time was on chat or the phone to Apple trying to get file sharing to work. Eventually I found the right Apple support tech and he breezed right through the setup no problem. ?The last piece seems to be the Epson print setup. ?I tried printing a plate and the driver doesn’t want to let me print using the front poster board feed. With the settings set for Front Feed it still refuses the media and causes a print error. I will try calling Epson today and see if they can help.
?
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Re: P900 and P908 Questions
Hi Roy,
This worked perfectly. I have only made experimental .qidf (text) and .quad on Mac for a quick grasp of methods, then saved .quad file in P900 folder on Win machine. Printing through Win GUI Quad900 printer showed the curve, and printed with my expected hue (exaggerated for experiement). Top pictur is unmodified (no V) and bottom is modefies (+V). Now for the hard part of creating actual curves, and setting up split-tone curves ... thank you for your help.
 ?
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Re: inkseparation8.tif is monochrome...
No issues here.? My misunderstanding of how this file looks on
screen.? Regret the false alarm.
Please ignore this.
Regards,
Ramesh
On 30/01/25 10:05 am, Ramesh Adkoli
wrote:
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Show quoted text
Thanks.? I am aware of that.? When I open this TIF file in
Photoshop, shouldn't it show all the colors?? My issue is that
the TIF file does not have all the colors. I checked other
inkseparation files in images folder and they also showed
similar colors as I had shown in my OP...
Regards,
Ramesh
On 30/01/25 9:42 am, Eben Ostby via
groups.io wrote:
You need to print it to the QTR printer you've set up, and
it needs to be NOT color-managed, and the QTR print options
need to be set to "Calibration mode" (that's why it says Print
In Calibration Mode at the top of the file). If you're on a
Mac, Print-Tool does a good job of allowing you to print
without color management.
is a description of how to do this, though the images of the
print dialogs are out of date.
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Re: inkseparation8.tif is monochrome...
Thanks.? I am aware of that.? When I open this TIF file in
Photoshop, shouldn't it show all the colors?? My issue is that the
TIF file does not have all the colors. I checked other
inkseparation files in images folder and they also showed similar
colors as I had shown in my OP...
Regards,
Ramesh
On 30/01/25 9:42 am, Eben Ostby via
groups.io wrote:
toggle quoted message
Show quoted text
You need to print it to the QTR printer you've set up, and it
needs to be NOT color-managed, and the QTR print options need to
be set to "Calibration mode" (that's why it says Print In
Calibration Mode at the top of the file). If you're on a Mac,
Print-Tool does a good job of allowing you to print without
color management.
is a description of how to do this, though the images of the
print dialogs are out of date.
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Hendrik Kuhlmann
Tracy Valleau
Cheryl Hanna-Truscott
Richard Boutwell