Re: Why is OS-X imposing a profile conversion of all greyscale images to "Generic Gray Gamma Profile 2.2"?
Re: Why is OS-X imposing a profile conversion of all greyscale images to "Generic Gray Gamma Profile 2.2"?
- Subject: Re: Why is OS-X imposing a profile conversion of all greyscale images to "Generic Gray Gamma Profile 2.2"?
- From: Roy Harrington <email@hidden>
- Date: Sat, 10 Mar 2012 08:47:16 -0800
The difference with the Canon is that its got a Photoshop plugin. Its avoiding
the OSX print system.
The standard OSX print system converts to a standard profile for all throughput.
(this is like the display system that all programs can be color managed without
actually doing any CM work -- just pass things through to the OS).
This all comes out of the Cocoa framework -- its the way it was designed.
When Adobe had to update PS, LR etc to Cocoa this started to be noticed.
There's a pretty much undocumented feature -- a print settings flag -- that is
a special "disable CM flag". It is used for all the Photoshop Manages Color
situations. Unfortunately it only seems to work for the RGB line and not for
the grayscale pipeline.
Roy
On Fri, Mar 9, 2012 at 6:06 AM, Ernst Dinkla
<email@hidden> wrote:
> On 03/08/2012 05:05 PM, Doyle Yoder wrote:
>>
>> This sounds like a printer driver issue to me.
>>
>> A true RIP would not be using a printer driver.
>>
>> In reference to PSCS5 no longer having the No Color Management settings,
>> which seemed to have been a knee-jerk response to improperly written printer
>> drivers at the time PSCS5 was being written.
>>
>> There are no profiles applied in the driver when printing B&W to Canon iPF
>> printers so I don't see this as an OS problem.
>>
>> Doyle
>
>
>
> Keith Cooper reviewed both the iPF6100 and iPF8300 and used QTR B&W
> profiling to get better tone separation in the B&W modes. He did that from a
> Mac system and used the same trick I proposed some time ago.
>
> See:
> http://www.northlight-images.co.uk/reviews/printer/ipf_6100.html#black_and_white
> and more reviews there.
>
>
> --
> Met vriendelijke groeten, Ernst
>
> Shareware now:
> Dinkla Gallery Canvas Wrap Actions for Photoshop
>
> http://www.pigment-print.com/dinklacanvaswraps/index.htm
>
> | Dinkla Grafische Techniek |
> | www.pigment-print.com |
> | ( unvollendet ) |
>
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--
Roy Harrington
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www.harrington.com
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