Digital BW, The Print

Steve,

Well, according to Bruce Fraser 
(http://www.creativepro.com/story/feature/15310.html)
"When both Paper White and Ink Black are unchecked, Photoshop uses Relative 
Colorimetric rendering with Black Point Compensation to go from the 
simulation to your monitor. What that means in English is that the paper 
white is mapped to your monitor's white, and the printer's black is mapped 
to your monitor's black. If you're printing to a bright glossy stock, this 
view is probably the most accurate. But if you're printing to a matte paper 
it may give you an overly optimistic view."

"The Ink Black checkbox turns off black point compensation in the rendering 
from the simulation to your monitor, and attempts to show you the actual 
black that will appear in print. If you're simulating printing to a glossy 
paper, you'll probably just see a very slight lightening of the shadows. If 
you're simulating printing to watercolor paper, newsprint, or an uncoated 
stock that produces relatively weak blacks, the shadows will likely lighten 
a lot when you check Ink Black. This setting is useful for fine-tuning 
shadow detail, particularly on stocks that produce weaker blacks."

"The Paper White checkbox makes Photoshop do an Absolute Colorimetric 
rendering from the simulation space to your monitor. It attempts to show you 
the influence of the paper color and also the true black (when you check 
Paper White, it automatically checks, and dims, Ink Black). But to do that, 
it has to dim all the colors -- to change the color of white, it has to 
reduce the values in one or more of the channels that it sends to the 
monitor, because the only way to change the color from RGB 255,255, 255 
(your monitor's white) is to turn something down. As a result, your first 
reaction when checking paper white may be that your image just died before 
your eyes. I've become accustomed to looking away from the monitor when I 
check Paper White so that I don't see the change happen. This simple trick 
makes it a lot easier to accept the paper color displayed on the monitor as 
a true white."



Bob Frost.

----- Original Message ----- 

From: "Steve Kale" <stevekale@...>



This is the same with the GM i1 Photo profiles.  If you select Simulate
Paper Color then Simulate Ink Black is automatically and irreversibly
checked (except by unchecking Simulate Paper Color).  One can Simulate Ink
Black without simulating paper color but not the other way around.
Interestingly, the Epson provided profiles (Mac 4800 driver) don't allow you
to Simulate Ink Black at all.

We're not sure what Adobe does when you check these settings, what it looks
for etc. I know this is one area where Roy would like to know more - for
obvious reasons.