Digital BW, The Print

Thanks to Paul Roark's recent experiments with yellow ink replacement  
in the 2400 I found a way to eliminate metamerism and color  
crossovers when printing neutral and toned RGB images via the Epson  
driver.  I replaced the yellow ink in my 2400 with LLK (lightest  
carbon ink) by simply refilling a Y position MIS  spongeless cart  
with LLK ink.  I'm using the MIS K4 inks, but the same could be done  
with Epson OEM K3 inks.  I then made new color profiles for this  
modified inkset using the i1 spectrophotometer and iMatch software.   
The resulting profiles have a very low gamut (truncated in the orange/ 
yellow/green) but are ideal for printing warm toned and neutral  
images without the metamerism and color crossover problems that arise  
when the yellow ink is included in the full inkset.  I put two of  
these "low gamut" profiles in the Hueblending archive on my  
filesharing site.  If you are using a 2400 with MIS K4 inks give it a  
try for warm tone or neutral RGB images.  You will need an extra Y  
cart filled with LLK ink to print with these profiles.  Also below is  
a link to a print scan made on Hahnemuhle Fine Art Pearl using the  
low gamut K4 inkset and profile with a 2400.

First Lab report:
The lab prints I had made by MPIX.com with a Durst Theta on Kodak  
Endura Metallic paper were excellent (but high gloss) and both  
neutral grayscale and toned images sent to them as sRGB tagged files  
printed with very high fidelity.  I haven't tried their matte or e  
surface papers yet.

Carl

http://homepage.mac.com/scho/FileSharing5.html

http://homepage.mac.com/scho/tones.jpg

On Aug 16, 2006, at 1:57 PM, Carl Schofield wrote:

> The RGB files you produce with the hueblending action can only be  
> printed in color using whatever workflow you normally use for color  
> printing.  Metamerism might a problem with the warmest blends if  
> you use CMYK inks in an inkjet printer with the Epson driver  
> because you will have no control over the amount of yellow ink  
> used.  Custom profiles and a good RIP would probably help a lot for  
> inkjet printing.  I'm testing some blends with labs that use  
> lightjet printers to see how they work out for making cards.
>
> Carl
>
> On Aug 16, 2006, at 1:29 PM, zisskar wrote:
>
>> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley"
>> <tyler@...> wrote:
>> >
>> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield
>> > <list@> wrote:
>> > >
>> > > Roy,
>> > >
>> > > I've also been using your create-icc script to generate icc  
>> profiles
>> > > for toning grayscale images and it works very well.
>> >
>> > It does indeed, and myself as well. Even before Create ICC, we were
>> > doing this with profiles made from the EyeOne Photo hack, or
>> > ProfilerPro. All of the images om my website and the gallery  
>> section
>> > of the Custom Digital site were made using an icc profile to  
>> show the
>> > hue of the quad inks selected for the print, even a split-tone  
>> by Mel
>> > Curtis. They were converted to sRGB for the web of course.
>> > Also, a similar aproached was used to assign the hue of Cone's
>> > selenium set to an image and then print with UCK3s on SilverRag,  
>> and
>> > it was lovely. Much more atractive than a straight ABW print. You
>> > could work forever trying to duplicate the look of an inkset with
>> > curves etc., but a good profile of it will get you all the
>> > complexities in one simple move.
>> > There are all kinds of great ways to use profiles, and Create  
>> ICC has
>> > become a great tool here.
>> > Tyler
>> > www.custom-digital.com
>> >
>>
>> This is all very interesting, but can you please tell me what to  
>> do next.
>> I've used Carl's HueBlend action profiles and got on screen the
>> desired hues. What is the recommended workflow for printing them?
>> Do I use PS or Qimage and color manage using the media icc  
>> profiles or
>> use QTR and special curves?
>>
>> .
>>
>> 
>



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