Digital BW, The Print

Yes.  But in greyscale there is actually, I believe, no difference between
relcol and perceptual. (You need to select perceptual in the driver so it
links to the A2B0/B2A0 tables.)


> From: Carl Schofield <scho@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Tue, 18 Oct 2005 13:01:36 -0400
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: Re: [Digital BW] ICC v. Transfer Function in Epson driver
> 
> Shouldn't the rendering intent be set to perceptual in the Print with
> preview dialog when using the gray icc profile for printing?
> 
> 
> On Oct 18, 2005, at 12:37 PM, Steve Kale wrote:
> 
>> 
>> 
>> 
>> 
>>> From: Paul Roark <paul.roark@...>
>>> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
>>> Date: Tue, 18 Oct 2005 09:23:12 -0700
>>> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
>>> Subject: RE: [Digital BW] ICC v. Transfer Function in Epson driver
>>> 
>>> I printed a 21-step test file with the icc that was created with this
>>> system, and the ramp is relatively dark with very compressed 90% -
>>> 100%
>>> steps.  It's not what I'd like to see as a final density
>>> distribution.
>>> 
>> 
>> I think this is something you have to be careful of.  Remember the
>> colour
>> management at work in showing the image on your display (no soft
>> proof or
>> anything) is doing an identical thing.  Perfect black (image file)
>> can't be
>> generated by your display.  Instead Adobe CMM is mapping the file
>> black to
>> your monitor's black point, most likely with relative colormetric
>> intent and
>> black point compensation (so there is no clipping).  So this is
>> exactly the
>> same thing as what the printer ICC profile is doing only the
>> printer black
>> is even worse.  So the point to remember is that you have been
>> looking at
>> this sort of scaling all the time for years.
>> 
>> The scaling of luminance in XYZ makes sense.
>> 
>> 
>> 
>>> 
>>> I was looking for an easy way to put the icc into the correct
>>> folder, but
>>> have not found one yet.  If I open the icc with Notepad and save it,
>>> Photoshop does not see it as an icc.
>>> 
>>> Is there a way to refresh the Photoshop icc list without closing and
>>> re-opening the program?
>>> 
>> 
>> Annoyingly, not that I know of.
>> 
>> 
>> 
>>> 
>>> Sorry for all the questions you guys have worked out long ago.
>>> 
>>> Paul
>>> www.PaulRoark.com
>