Digital BW, The Print

Sam,


good question - I can only answer for the use of the word "profile"
in IJC:  It is a small file that contains a look-up table that when used
in OPM it tells the printer what intensity of ink to put down for a given
gray value.

As an example, you can map a 50% image gray to a 50% ink laydown for
a given jet - or not. You can map it to 55% or 45% or anything else.
These numbers are for illustration only - internally the math is done
in 16 bit.

The confusion comes from the fact that color management
uses the word "profile" to describe files (icc) that also contain look up
tables but are far more complex because they have to describe
the color behaviour of a device. They also have to work independently
of a specific application - as long as the app is icc-savvy. 

The difference to keep in mind is that "profiles" in IJC are only meant
for OPM (hence cannot be used in Photoshop, for example). They are
only useful in this one task; making a print from a grayscale file
on one of the supported printers, regardless of the type of inks
 a printer is loaded with (they can be color or mono).

Antonis



--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Sam McCandless 
<samcc@v...> wrote:
......

>But at the outset I find 
> myself stumbling over the word "profile" because I tend to think of 
> profiles in the context of color printing. So early on I hope for an 
> explication of what B&W profiles are.
> 
> Thanks.
> --
> Sam