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Puzzled with calibration print

Puzzled with calibration print

2015-02-06 by Bart Wybouw

Hi all,


I’m trying to print a Calibration page but the results I am getting are no where near what I need to get.


I’m on


- Mac OS 10.9.5
- PS CC
- Epson 3800


I’m either getting a page with a blank canvas but the first three rows have all different colors.
Then row 4 still has some colors, row 5 has two colors and all the rest is empty.


Or I get a page with a pink canvas and full with colors, the same sequence on all the „color rows”.


I’m opening the profile of the inksep.psd file (QTR-RGB lab), printing using PS manages colors, QTR_RGB_MATTE profile, perceptual, black point comp on.
In the driver I select calibration mode and ink limit at 100%.


What am I missing ?


When I’m am printing the inksep.psd file with the 8-bit driver setting and all curves to neutral I'm getting a normal grayscale page.


TIA,


Bart

Re: Puzzled with calibration print

2015-02-06 by richard@...

You can not print the ink separation page from Photoshop because the color management system messes up the RBB values as it goes to the printer and calibration mode freaks out. You need printer from either Adobe Printer Utility, or PrintTool, which is available from the quad tone rip site.

Richard Boutwell

Re: Puzzled with calibration print

2015-02-06 by richard@...

I should have clarified, when printing from Adobe Color Utility or (QTR) PrintTool, you do so because you do not want to introduce color management of any kind. You want the RGB values in the ink separation images to be exactly as they are without any translation so the individual ink channels will fire separately. These are the same values that the printer uses internally to print the nozzle check patterns.

At some point around 10.6 Mac and Photoshop started feeding all images to the printer with some color profile assignment behind the scenes. That is why Roy created (QTR) PrintTool for the Mac.

Hope that helps.

Richard Boutwell

Re: [QuadtoneRIP] Puzzled with calibration print

2015-02-07 by Bart Wybouw

Hi Richard,

thanks for your help, that did indeed do it.

I’m a bit surprised that this is not mentioned in the documentation that comes with QTR …
Would have save me a lot of time, ink, paper and hear scratching ;-)

Have a nice weekend!

Op 6-feb.-2015, om 23:27 heeft richard@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> het volgende geschreven:

I should have clarified, when printing from Adobe Color Utility or (QTR) PrintTool, you do so because you do not want to introduce color management of any kind. You want the RGB values in the ink separation images to be exactly as they are without any translation so the individual ink channels will fire separately. These are the same values that the printer uses internally to print the nozzle check patterns.


At some point around 10.6 Mac and Photoshop started feeding all images to the printer with some color profile assignment behind the scenes. That is why Roy created (QTR) PrintTool for the Mac.

Hope that helps.

Richard Boutwell


Re: [QuadtoneRIP] Puzzled with calibration print

2015-02-07 by Bart Wybouw

Just wondering … given this issue …


When using the x-rite i1profiler software, is there a similar problem?
Or does the x-rite software what the adobe print utility does?


Regards,


Bart




Op 7-feb.-2015, om 14:01 heeft Bart Wybouw bart.wybouw@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> het volgende geschreven:
Show quoted textHide quoted text
> Hi Richard,
>
>
> thanks for your help, that did indeed do it.
>
> I’m a bit surprised that this is not mentioned in the documentation that comes with QTR …
> Would have save me a lot of time, ink, paper and hear scratching ;-)
>
> Have a nice weekend!
>
> Op 6-feb.-2015, om 23:27 heeft richard@richardboutwell.com [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> het volgende geschreven:
>
>> I should have clarified, when printing from Adobe Color Utility or (QTR) PrintTool, you do so because you do not want to introduce color management of any kind. You want the RGB values in the ink separation images to be exactly as they are without any translation so the individual ink channels will fire separately. These are the same values that the printer uses internally to print the nozzle check patterns.
>>
>>
>> At some point around 10.6 Mac and Photoshop started feeding all images to the printer with some color profile assignment behind the scenes. That is why Roy created (QTR) PrintTool for the Mac.
>>
>> Hope that helps.
>>
>> Richard Boutwell
>>
>
>
>

Re: [QuadtoneRIP] Puzzled with calibration print

2015-02-07 by Bart Wybouw

To answer my own question …


I just did the test and the profiles are nearly identical (difference is measurement error).


Op 7-feb.-2015, om 17:39 heeft Bart Wybouw bart.wybouw@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> het volgende geschreven:
Show quoted textHide quoted text
> Just wondering … given this issue …
>
>
> When using the x-rite i1profiler software, is there a similar problem?
> Or does the x-rite software what the adobe print utility does?
>
> Regards,
>
> Bart
>
>
> Op 7-feb.-2015, om 14:01 heeft Bart Wybouw bart.wybouw@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> het volgende geschreven:
>
>> Hi Richard,
>>
>>
>> thanks for your help, that did indeed do it.
>>
>> I’m a bit surprised that this is not mentioned in the documentation that comes with QTR …
>> Would have save me a lot of time, ink, paper and hear scratching ;-)
>>
>> Have a nice weekend!
>>
>> Op 6-feb.-2015, om 23:27 heeft richard@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> het volgende geschreven:
>>
>>> I should have clarified, when printing from Adobe Color Utility or (QTR) PrintTool, you do so because you do not want to introduce color management of any kind. You want the RGB values in the ink separation images to be exactly as they are without any translation so the individual ink channels will fire separately. These are the same values that the printer uses internally to print the nozzle check patterns.
>>>
>>>
>>> At some point around 10.6 Mac and Photoshop started feeding all images to the printer with some color profile assignment behind the scenes. That is why Roy created (QTR) PrintTool for the Mac.
>>>
>>> Hope that helps.
>>>
>>> Richard Boutwell
>>>
>>
>>
>
>
>

Re: Puzzled with calibration print

2015-02-07 by richard@...

I tend to print all targets through the same application with no color management, in my case, PrintTool. It is more about having as few variables as possible. I haven't done extensive testing with printing targets through i1profiler because apps like that and color port always put header/footer info someplace on the page where I would maybe want to print on a second or third pass.


RB

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