Digital BW, The Print

Hello Steven,

Sorry for the lack of profile information on the web site, a complete list will be 
posted on our web site very soon.  IJC/OPM ships with starter profiles for most 
all of it's supported printers.  Most of the shipping profiles are for the 2200/
2100 with UltraChrome Inks and MIS UT2. These UltraChrome profiles are 
easily modified for the 7600, 9600 and the 4000.  IJC/OPM profiles are not 
ICC profiles, so a standard ICC profile can't be used.  
Since IJC/OPM is built for any ink set,  IJC ( the profile editor) gives the user a 
complete visual system for making and modifying profiles.

General IJC/OPM profile information.

Three main parts to a IJC/OPM profile;
1, Ink Curve shapes (ink partitioning) 
2, Linearization 
3. Toner adjustment.

Ink Shapes-
This is where each ink shape is set,  this controls where each ink starts, where 
it stops and it's actual shape.  In IJC/OPM each ink in your printer is controlled 
by it's own unique 16bit spline.  These splines are edited in IJC in the Curve 
Shape editor.  

When editing a Curve Shape you can use any of the built-in predefined curve 
shapes, or completely free hand (Free Edit) your own.  The built in shapes are 
designed to be a quick way to make quadtone or hextone profiles.  For 
example to make a profile for a 4 color printer (like a 1160) with Quadtone 
inks, it's as simple as Selecting the "Black ink Shape" for Ink 1,  the "Dark grey 
Shape" for ink 2, the "Mid Grey Shape" for ink 3 and the "Light grey ink  
shape" for ink 4., Then print out your Linearization Target read it in and your 
done. (More on Linearization later )

In Free Edit mode, the spline editor lets you control the ink shapes by letting 
you manipulate the curve by clicking and dragging control points.   This is 
similar to the "Curves" window of PhotoShop.  Free edit mode also gives you 
the ability of  importing and exporting the these curve shape.  IJC/OPM PC 
ships with a complete set of Epson UltraChrome Free Edit ink shapes.  These 
can be used on any Epson UC printer, 2200, 7600, 9600 and the 4000. To 
make new profiles.

Free edit curves and the built-in Quadtone curves can be used within the 
same profile. This is really nice when you are working with a Quadtone inkset 
with toners.

Linearization-
Once you have your Ink Shapes, ( ink partitioned ) the next step is to 
Linearize.  By definition, linearization establishes a standard, this standard  is 
the ideal relationship of each step from hilight to shadow.  IJC/OPM generates 
internal targets which you use for Linearization.  IJC will take values read from 
this Target from a densitometer,  a Spectrophotometer or you can scan this 
Target and import the scan directly into IJC.  These readings are analyzed by 
IJC and the corresponding linearization is attached to the profile.

One example of  Linearization would be to use a 2200 profile on a 9600.  You 
would simply load the 2200 profile in IJC, print a target for linearization to your 
9600.  Then input the readings and save the new profile.

Toner Adjustment-
This is a quick and easy method to modify the tone of a profile.  Profiles with 
ink toners or color inks, e.g. Epson UltraChrome and MIS UT7.
The toners can be linked to a slider,.  These sliders can be in linked together 
or independently adjusted.  This gives the user the ability to modify the tone of 
a profile in a quick and easy method..  


Joe.
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Steven Karafyllakis" 
<steve@s...> wrote:
> 
> Joe, Antonis:
> 
> First, a Happy New Year to all, may 2005 have as many interesting 
> and useful developments as 2004.
> 
> This all looks very interesting, but I need to have a few questions 
> answered before making the leap:
> 
> Looking around on the Bowhaus web site, I see that the package comes 
> with a set of 'starter' profiles, but I could not find out which 
> papers and inks are covered, can you give us some info on that? Will 
> there be more profiles available over time?
> 
> Realistically, does one need to have a densitometer to make new B&W 
> profiles, or does a scanner actually work well?
> 
> I'm still not clear as to what kind of an ink setup this is intended 
> for: quadtone, hextone, Ultrachromes, what?
> and if it works with Ultrachromes is it ICC compliant? IOW can I use 
> a third party profile made with, say Monaco, or Gretag, etc.,
> 
> Are there any compositing abilities? Can I print several different 
> images/sizes on the same piece of paper?
> 
> Thanks looking forward to learning more.
>