Re: Profiling black & white printing
Re: Profiling black & white printing
- Subject: Re: Profiling black & white printing
- From: Marco Ugolini <email@hidden>
- Date: Sun, 15 May 2005 17:11:50 -0700
In a message dated Sat, 14 May 2005 20:46:30, CDTobie wrote
> The B&W mode is not profilable, its a fixed setting mode. The only
> adjustments are a choice of density settings, and a hue adjustment control.
I understand that these are the controls available within the new driver.
But what I am after is a methodology to ensure that all tonalities in
grayscale come out looking exactly as they ought to according to what
appears on a calibrated and profiled display in Photoshop.
Can such a methodology be derived from ICC profiling for 4-color process?
Does color management in any way apply to the printing of grayscale images
using black-only inks? If so, how?
Or is the hard way, through trial and error, the only methodology possible
instead? (Output a value to print, measure its L*, adjust, output again,
measure again, etc.)
One added difficulty is that the visual appearance of grayscale values can
be made to translate to L* values under several different scenarios, with
changing results.
So, for example, if you enter a 15% value in a grayscale file in Photoshop,
it translates to an L* of 87 (in RelCol) if the grayscale file has a gamma
of 2.2, but the L* goes up to 89 in gamma 1.8. So, how does one produce a
print that precisely reflects the L* values corresponding to what one sees
in the grayscale file on the monitor, in whatever gamma environment?
Please forgive any confusion I may be showing on this subject. Black & white
is dear to my ex-darkroom-printer's heart, and I am trying to understand how
Epson's UltraChrome K3 inks are changing the approach to it.
Thank you.
--------------
Marco Ugolini
Mill Valley, CA
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