Re: Everyday backlit prints
Thanks, Mike.
Red River Glossy seems like the way to go.
Your digital negative method looks amazingly impressive, though daunting for those of us who have used QTR only in fairly simple ways. It’s been several years since I checked to see what QTR stuff was available online, but 10 years ago I didn’t find the
explanations/instructions too helpful for the uninitiated. :-)
Myron
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On Jan 18, 2025, at 12:47, mike rosenberg via groups.io <mprosenberg417@...> wrote:
External message:
Use caution.
On my website I describe a method for making digital negatives for silver gelatin prints using Red River glossy paper.? It does not have a watermark on the back of the paper. A similar question of back-lighting
a print was raised on the Large Format Forum; he tried Red River Glossy paper and was very pleased with the result.
Thanks, Kirk.? I’ll give that a try.
Myron
External message: Use caution.
Maybe try Red River light weight (7 mil thick, 42lb) ?glossy:
I have not printed on it, personally, but it seems to fit the bill.? The manufacturer notes that the non-glossy side is plain white and that you can print text or graphics on that side as well.? Red River also offers heavier paper in the same configuration:
Kirk
A few years ago I discovered that prints on Kirkland glossy paper looked good when framed and hung in a window so they would be backlit.
The frames were Dollar Store double glass frames (photograph between two pieces of glass, no matting).
I would place a second piece of glossy paper against the back of the print, with the surface facing out or away. The frame was then hung in a window. I assumed that any UV from sunlight or skylight would be absorbed before it made its way to the ink layer.?
During the day the print would mostly be lit from behind, and when it was dark outside the image would be lit by ordinary room lighting. I was surprised at how well this worked in my home.
I no longer have access to Kirkland paper (if it is still made). Epson Premium Luster is a good substitute for everyday printing, but it has watermarks on the back.
Does someone make a similar quality paper without watermarks??
Is anyone using glossy paper as a digital negative (for contact printing in the darkroom)??
I live well off the beaten path, so it’s not easy to have a look at a variety of paper.
Thanks!
Myron
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Re: Printer descriptor file (ppd) not found for printer quad error
From memory: InstallP5000=4900.command
regards -Walker
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On Jan 18, 2025, at 4:37?AM, greg brophy via groups.io <greg@...> wrote:
This is the name InstallP5000.command from the QTR/Profiles/Quad5000 folder/ do I have to change it to InstallP5000-greg.command or something else inbetween installP5000 and command? I have never had to do that before.
?
Greg
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Re: Everyday backlit prints
On my website I describe a method for making digital negatives for silver gelatin prints using Red River glossy paper.? It does not have a watermark on the back of the paper. A similar question of back-lighting a print was raised on the Large Format Forum; he tried Red River Glossy paper and was very pleased with the result.
Thanks, Kirk.? I’ll give that a try.
Myron
External message:
Use caution.
Maybe try Red River light weight (7 mil thick, 42lb) ?glossy:
I have not printed on it, personally, but it seems to fit the bill.? The manufacturer notes that the non-glossy side is plain white and that you can print text or graphics on that side as well.? Red River also offers heavier paper in the same configuration:
Kirk
A few years ago I discovered that prints on Kirkland glossy paper looked good when framed and hung in a window so they would be backlit.
The frames were Dollar Store double glass frames (photograph between two pieces of glass, no matting).
I would place a second piece of glossy paper against the back of the print, with the surface facing out or away. The frame was then hung in a window. I assumed that any UV from sunlight or skylight would be absorbed before it made its way to the ink layer.?
During the day the print would mostly be lit from behind, and when it was dark outside the image would be lit by ordinary room lighting. I was surprised at how well this worked in my home.
I no longer have access to Kirkland paper (if it is still made). Epson Premium Luster is a good substitute for everyday printing, but it has watermarks on the back.
Does someone make a similar quality paper without watermarks??
Is anyone using glossy paper as a digital negative (for contact printing in the darkroom)??
I live well off the beaten path, so it’s not easy to have a look at a variety of paper.
Thanks!
Myron
|
Re: Printer descriptor file (ppd) not found for printer quad error
This is the name InstallP5000.command from the QTR/Profiles/Quad5000 folder/ do I have to change it to InstallP5000-greg.command or something else inbetween installP5000 and command? I have never had to do that before.
?
Greg
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Hi Henrick
Well that's really strange.
A couple more things:
Try it in inches. I think you may have 2 files -- one for mm and one for in.
Combinations are good: each file with both mm and in.
Measurement of the box size as well as position printed would also be good.
Send the tif files to me, too.
Thanks,
Roy
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Re: Printer descriptor file (ppd) not found for printer quad error
The install script name is crucial.? Should at least start with InstallP5000 then -extra stuff then .command
i.e.: ? ?InstallP5000-mine.command
Hi,
?
I am trying to install a profile on an intel mac using qtr 2.8.2 for a p5000. The printer is already installed and has profiles on it already but when I try to install a new profile, I get this error "printer descriptor file (ppd) not found for printer quad". I tried reinstalling qtr but I still get the same error message. Any ideas as to why.
?
Thanks,
?
Greg
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Re: Printer descriptor file (ppd) not found for printer quad error
The P5000 uses the 4900 ppd so ad the appropriate =4900.command into the command file name and it will work
-Walker
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On Jan 17, 2025, at 1:05?PM, greg brophy via groups.io <greg@...> wrote:
Hi,
?
I am trying to install a profile on an intel mac using qtr 2.8.2 for a p5000. The printer is already installed and has profiles on it already but when I try to install a new profile, I get this error "printer descriptor file (ppd) not found for printer quad". I tried reinstalling qtr but I still get the same error message. Any ideas as to why.
?
Thanks,
?
Greg
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Printer descriptor file (ppd) not found for printer quad error
Hi,
?
I am trying to install a profile on an intel mac using qtr 2.8.2 for a p5000. The printer is already installed and has profiles on it already but when I try to install a new profile, I get this error "printer descriptor file (ppd) not found for printer quad". I tried reinstalling qtr but I still get the same error message. Any ideas as to why.
?
Thanks,
?
Greg
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QTR & QuadToneProfiler-DN v3 : Blocking density very low (patch 20) : what should I do ?
Hi there !
?
I am using Richard Boutwell's program QuadToneProfiler-DN v3 to create .quad curve for the gold toned Vandyke Brown process...
?
I am using Bergger COT320 paper and Tecco SF140 transparencies. I am using an EPSON P600 printer.
?
When printing the blocking density test, I found that the blocking density (which is patch 20) is considerably less than the default ink load.
?
?
In this case, the following is adviced by Richard Boutwell :
If you find the blocking density is considerably less than the default ink load (a value of 30, for example) you might not want to lower it too much lower than the default setting because it might make it harder to linearize given that the lower overall ink load is too low throughout the whole scale—especially the mid tones. If this is the case, you should just rely on the linearization function to correct for the increased contrast in the highlights of the print?
?
If I understand correctly, I should move the "Black Boost" slider so that the "Maximum Black Percentage" value that is shown at the top is 20... But even if I drag the slider to the left hand side , the minimum value of the "Maximum Black Percentage" I get is 25...
?
?
What should I do ?
?
Also, I think there are bugs in this dialog.... If I change the process preset in the bottom dropdown, the value of the "Maximum Black Percentage" changes accordingly, also the curves in the graph changes, but the values of the sliders do not change.... This is perturbing, to say the less. (since the curves and Maximum Black Percentage value are derived from the sliders values, right ?)
?
Thank you for your replies and help !
?
Best regards,
?
Lo?c
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Dear Roy:
?
Thank you very much for responding.
?
Here is a minimum example in which I reproduce a case which was part of the previous post #19313 of mine: I want to print a square of dimension 30x30 mm on a paper sheet of size A4 using the Epson printer R2880 such that the upper left corner of the square is located at 100 mm from the upper border and 100 mm from the left border of the paper. ?
Figure 1 shows the QTR settings I have used and? figure 2 displays a scan of the page which resulted from printing with these parameters (OS is win10). With a ruler I find the position of the upper left corner of the printed square is located at (76 mm, 76 mm). The deviation from the expected position (100 mm, 100 mm) is much more than the usual tolerance of the paper feed (1-2mm) of this printer. The size of the square is correct.
?
I obtained the same result when printing on a P900 using the same QTR paper, placement and scale settings. I wonder if this result is reproducible by others.
?
Hendrik
?
Figure 1:
?
Figure 2:
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Hi Hendrick
Your calculations look correct as far as I can see. But there's really no way to help
without seeing what you are actually doing and getting.
You need to start very simple -- one image (send that), place it a fixed place on the paper.
Show the QTRgui page, then the paper with measurements on it (x,y).
Roy
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Re: P6000 Digital Negative via QTR with OEM inkset
On Mon, Jan 13, 2025 at 03:08 PM, Jeff Kew wrote:
Hi Jeff
?
Could you elaborate on using piezo vapors to clean a print head??
?
Sandy
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Dear all:
I apologize for bothering you again. I just noticed that even the image placement using inches does not work as expected: Take an A4 sheet of size (8.26'' x 11.69'') minus the non-printable borders (on the R2880) of width 0.13'' on each side. This leaves a rectangle of 8.00'' x 11.43''. Take half of that and print two rectangles of 8.00'' x 5.71'' in order to seamlessly fill the printable area. But nope (see figure). Is there a general consensus that it is better create an ICC profile and print from another application?
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Re: Convert .quad file to .qidf file?
The short answer is no.
?
There are just too many variables that do not ride along with the output quad file.
?
The first problem: there is no way to "unlinearize" back to the initial partitions without the measurements being in the comments of the quad file (or not knowing if it had a gray_curve=... applied prior to linearization). And then no way to reverse engineer the gray_highlight/shadow controls because of how different papers might handle the inks loads.
?
But, assuming you could do all that you _might_ be able to recalculate the gray_value= and ink limit settings.
?
All the best,
Richard Boutwell
http://www.richardboutwell.com/
http://www.bwmastery.com/
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On an A4 sheet I printed squares placed such that they should
touch. They should neither overlap not be separated. QTR does what
it should if the placement is given in inches. But it is not
capable to place images using mm. Perhaps known trivial bug.
 
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Re: Convert .quad file to .qidf file?
Try chat gpt. Upload it and ask it to convert the file.?
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On Jan 15, 2025, at 1:47?PM, Paul Cunningham via groups.io <paul@...> wrote:
? Hi, is there a way (utility) to recreate a .qidf file from the .quad file? Thanks.
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Convert .quad file to .qidf file?
Hi, is there a way (utility) to recreate a .qidf file from the .quad file? Thanks.
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Hello,
I am new to this forum. I converted my R2880 into a black-only
printer using the inks according to Paul's GCVT formulation. After
two head cleans I made the first test print of Keith Cooper's jpg
test image using QTR v2.7.0.0 (win10) on Hahne PR308 using the
quad GCVT-Pa325-warm-carb.quad. I used an A4 sheet in portrait
orientation (only to print in the upper half of the sheet) and
selected the scale "To fit". The small preview in QTR seemed o.k.
(width fits), but the width of the print was too narrow (about
170mm instead of about 200mm).
Since the print had some residual tint (only 2 head cleanings
after replacing the OEM carts), I wanted to quantify this effect.
Therefore, I used only one color channel out of C, LC, M, LM of
the above quad and printed a square (30x30mm, 2880ppi,
Lab=(40,0,0)). This time I used in QTR the scale "100%" (as
recommended earlier on this forum), the resolution 2880, and
specified the placement (top left corner of the printed square)
such to align the four patches in a row. The tint was obvious and
consistent. After another (3rd head clean) the tint was almost
gone ('second row').
However, the positions of the squares scattered in a (for me)
unpredictable way. In the attached image the tick marks indicate
the targeted vertical and horizontal positions of the upper left
corner of each square.
What am I doing wrong?
Best,
Hendrik
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thanks for the correction and confirmation. Yes, I got a VLM cart from a 7890 and will use to fill for a 7880,
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K3 no but K3 Vivid from the x880 onwards yes.
-Walker
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On Jan 13, 2025, at 3:04?PM, Jeff Kew via groups.io <jeff@...> wrote:
Anyone know if Vivid Light Magenta is the same ink formulation across all ink lineups? eg: K3, HDR etc...
Can I buy VLM for the 7890/9890/9900 and use it in a 7880 or 9880 in refillable carts? Is it the same ink?
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greg brophy
Lo?c
Hendrik Kuhlmann
Richard Boutwell