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Author Topic: Colour cast  (Read 8421 times)
brucet
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« on: December 20, 2013, 02:35:24 AM »

Hi Guys,

After a period of time I'm back trying to solve a printing issue. So I downloaded the trial of Qimage again and set everything up. (I'm sticking with Qimage this time so be prepared for some more questions.  Smiley).
I'm using PSPx6. No colour management.
An Epson 1410. I have turned OFF colour management.
Ilford Smooth Pearl. I have downloaded and installed the profile.

I have followed and read all of Qimage documentation!!! I think! Evreything looks fine in PSPx6 and in Quimage. Colours are fine.
So my problem is - If I print a small 6 x 4 gloss print colour is excellent but tooooo dark. If I print an A4 using the Ilford profile the print is ok with darkness but the colour is now very faded. Also vignette and blacks have a 'green' cast. My main issue is the lack of yellows. (I have installed new ink tanks).

So? My question is what has my poor brain overlooked?

Regards
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brucet
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« Reply #1 on: December 20, 2013, 03:57:39 AM »

A quick update. I tried the same print using Gloss Photo paper. (Profile Epson PGPP). All is well. A touch dark but passable.
So the issue is with the Ilford paper and profile? I just purchased a box of 100 and downloaded the new profile.  :-\

So is there a problem with the Ilford profile?
Qimages interpretation of the profile?
or
Am I to blame? Is there something I've overlooked?

regards


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Mack
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« Reply #2 on: December 20, 2013, 04:09:21 AM »

I have PSP X6 also.  I haven't been too impressed with the color out of that program vs. PhotoShop CS6 or most any other.  When I open it, it takes over my monitor's calibrated profile which sort of ticks me off as I can see the screen color shift when I open it from the default.  Once out of it, I have to revert the profile back to the calibrated one.  The Corel forum has some people who have issues with color management with PSP X5 and X6.  I wish they'd fix it.  I played with their software's color screen calibrator, and the two x-rite's and they are different in the final profile result.

Offhand, I'd guess your "Too dark" glossy is maybe your monitor being too bright which seems the norm.  Your lighter "Pearl" may be a different profile that puts less ink down than say your glossy print is getting.  Problem is the Ilford generic profiles sort of fit, but I haven't found them all that accurate compared to making your own.  Some paper surfaces take ink far better and make blacks much blacker than other surfaces which compounds the problems.  Epson doesn't make it easy as they have all sorts of paper types (glossy, matte, art, luster,etc.) and trying to make one fit another manufacturer's brand can be difficult.

Personally, I'd invest in something like a "ColorMunki Photo" to make sure your monitor is within tolerance for printing, and then run your sundry papers through it to establish an ICM profile to pull up in Qimage to print with.  I just had a peek at all my ICM profiles for my printers and all the papers I use and there are 244 of them in the C:\Windows\System32\spool\drivers\color folder.  Most all are ones I made due to the inks I use (I gave up on pigments over dyes due to the papers I use.) and different printers I call up via Qimage.

I use several hardware calibrators: "DataColor Spyder 3" (Monitor only, and now retired.), x-rite "ColorMunki Photo" ($450) which does both monitor and printer profiles, and the x-rite "i1 PhotoPro 2" ($1,500) which does monitor and printer but also accounts for optical brighteners out of some "bright white" papers and bright white canvas that excess 100+ in brightness.  The ColorMunki Photo is sort of fun to play with though whereas the i1 PhotoPro 2 can be time consuming as heck to read some 2,300 color chips.

I have one printer I use for proofing, a Canon 9000 II, that I run OCP inks in.  My refills cost about 35 cents a cartridge so the money I saved in a year by not buying the OEM $16 carts paid for the "ColorMunki Photo" which profiles those inks too.  Buy some Costco Kirkland paper ($15 for 150 sheets) and it costs me maybe 12 cents an 8"x11.5" print.  Then I can move up to the Epson later once I have the print worked the way I want it via Qimage.

I suspect if what you are seeing in Qimage is the same for your different papers on your screen yet your prints look different, then it's time to calibrate with some hardware for those different papers.

Good luck.

Mack
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brucet
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« Reply #3 on: December 20, 2013, 04:28:51 AM »

Thanks Mack. The thing is that I was 'almost' happy printing out of PSP. (I have used it for years and turn off the colour management). I have a commission from a museum and was trying to squeeze the last bit of 'perfection'!! out of them by trying Qimage again. I can get good results using gloss paper from either PSP or Qimage. The Ilford paper has thrown a spanner in the works. I've used the Ilford paper before. But they have changed it and released a new profile.
I just printed, via Qimage, an image onto Canon gloss paper using an Epson profile!! Almost spot on. Stranger things have happened. The only thing is I/ the museum don't want gloss prints.

My monitor is ok. Everything is ok. It's just the move to Qimage and Ilford at the same time that has gone haywire. (I've tried printing on the Ilford paper from PSP and got the same colour cast).

Regards
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Fred A
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« Reply #4 on: December 20, 2013, 09:59:16 AM »

Quote
My monitor is ok. Everything is ok. It's just the move to Qimage and Ilford at the same time that has gone haywire. (I've tried printing on the Ilford paper from PSP and got the same colour cast).

Sounds like Mack has you covered. The only thing I didn't hear was a "Nozzle check" / "Nozzle clean"
That's a necessary item to rule out.

Fred
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brucet
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« Reply #5 on: December 20, 2013, 10:21:27 AM »

Thanks Fred A. But if it was a nozzle/clean issue then I wouldn't get the results on the gloss paper!

Tomorrow I'm going to try printing on the Pearl with Ilfords 'old' profile and see if there is a difference.

Another thought! Printing on the Ilford pearl is only taking about half the time it takes on the gloss. Almost as though it's only laying down half the ink.

regards
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Fred A
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« Reply #6 on: December 20, 2013, 11:49:26 AM »

Quote
Another thought! Printing on the Ilford pearl is only taking about half the time it takes on the gloss. Almost as though it's only laying down half the ink.

Usually a color cast indicates a wrong paper selection or clogged nozzles/
For example, (as you mention) the Ilford driver settings were different either in paper selection... forgot, and the Plain Paper was selected, your other settings sometimes follow the paper selection, and quality goes down as speed comes up, plus the driver being set to NO COLOR ADJUSTMENT now depends on a profile you are using which determines the colors and cast against a plain Xerox copy paper, you could get weird results.

Another item,,,, Ilford will give you free profiles for their paper, but they always had the "code" PDF file which contains the codes for which settings go with which printer and which paper.
If I recall something like IGSP112000_EPGn     and that told you what paper to select in the driver and the settings for color adjustment etc.

It looks like this, but more extensive for each printer in the file.

You can download the PDF file from them, or maybe this link will work.

Fred
PS I just downloaded their new pdf file from this past MAY.
« Last Edit: December 20, 2013, 12:19:43 PM by Fred A » Logged
Mack
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« Reply #7 on: December 20, 2013, 06:47:08 PM »

I'll add, read the closing comments in this PDF file on Epson printers (Page 10): http://www.digitaldog.net/files/Profile_FAQ.pdf

Your paper selection in the Epson driver does affect the print density.  There is a TIF file in the PDF (Inkdensity.tif  Here: http://www.digitaldog.net/files/InkDensity.zip ) that one can use to test out various papers "PRIOR" to running some calibration for their ICM profiles that tunes them in further.  It helps to obtain your unique paper's density first prior to chasing down (or calibrating) a correct profile for the way Epson does it (i.e. Correct paper selection precedes any image profiling.).

Sounds like you need to get the ink density down for your two papers as they seem different and why the Epson driver is doing a "speed shift" and ink density difference (i.e. Luster ain't Glossy which ain't Pearl which ain't Canvas either so ink "lie-downs" will be very different between them all.).

Nice thing about QU is that it will remember this "big mess" the next time you go through it.  Smiley

Mack
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brucet
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« Reply #8 on: December 20, 2013, 09:57:28 PM »

BINGO!

All is now well in the asylum. The problem was the paper selection. The Ilford paper is a smooth semi gloss/pearl. So my poor brain selected Epson Semi Gloss. NO. I now realize I should have selected Epson Ultra Gloss.
My logic said that semi gloss = pearl. NO. That's why it was printing faster. Now with Ultra Gloss it's printing slower. Much slower and laying down more ink.

See it pays to read ALL of the documentation and not make assumptions.  Grin

Never too old to learn. Never too old to make mistakes. The issue is now admitting I got it wrong!!!

Thanks for the input.

regards
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