Digital BW, The Print

Roy,

I've also been using your create-icc script to generate icc profiles  
for toning grayscale images and it works very well.  I also made a  
simple Photoshop action for blending hues with any two icc profiles  
and put this on my filesharing site along with 4 sample icc profiles  
to use for hue blending (QTR warm, lenswork warm, QTR cool, and  
Oriental Seagull toned selenium).  These icc profiles are only for  
toning and are not to be used as print profiles.  The resulting toned  
RGB files can be printed using any RGB or CMYK workflow, but there  
will be some variance in print hues obtained, depending on paper and  
print profile quality.  As you observed, a high quality CMYK profile  
used with a RIP can provide a good print match.

Regards,
Carl

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

On Aug 13, 2006, at 10:26 PM, Roy Harrington wrote:

>
> Most discussion here revolves around getting your grayscale images  
> to print
> on your inkjet printer with your own personal tones -- warm/cool/ 
> sepia/split
> or the latest idea matching Lenswork printing.
>
> But once you do that, what about showing or reproducing those tones  
> other than
> in your prints. I.e. wouldn't it be nice to have your web site show  
> the actual tone
> of your prints. Or how about making postcards that match your prints.
>
> Naturally you can convert to RGB and experiment till you get  
> something close.
> But Color Management and ICC profiles can do all this for you  
> automatically..
> I've recently been printing with my own custom split-tone curves  
> and wanted to
> make some cards. The card printer wants CMYK separations for  
> printing. In the
> past to be on the safe side I just shipped them CYMK's that were  
> just K ink so
> they were just one ink printing. The results were fine but not  
> special.
> Well now they provide full CMYK profiles of their printer and in  
> fact have one that
> has maximum GCR conversion -- i.e. minimum color inks. This of  
> course has
> been the method we're all using on inkjets. So I figured this was  
> all worth a try.
>
> Naturally I print with QTR and have my custom profiles. I also  
> create custom ICCs
> for soft-proofing in Photoshop, so I can see the exact color of the  
> prints of the
> display. Well its easy to convert the color to RGB or CMYK.
>
> Simply - Convert to Profile from grayscale to the custom QTR gray  
> ICC profile.
> This will now look exactly like your soft-proof. Note that it's  
> still a grayscale
> file but it has color. Use the Eye-Dropper and see LAB values.
>
> Now you can Convert to AdobeRGB or sRGB and maintain the colors on  
> the web.
>
> In my case I Converted to the printer's CMYK profile. Color has  
> been maintained
> thoughout the whole process. I sent the CMYK files in and the cards  
> came back
> a great match to the tone of the actual prints.
>
> ----------------------
>
> The talk recently about matching Lenswork tones is also easy to do.  
> Measure a
> few points in the magazine, or for that matter make up LAB values  
> that you'd
> like to match. For instance take these LAB values that Paul posted.  
> Here they are:
>
> 9 0.9 0.7
> 27 2.1 3.3
> 40 2.4 4.2
> 53 2.4 3.3
> 75 2.0 1.6
> 93 1.2 -1.5
>
> Just put them into a text file and drop it on QTR-Create-ICC. You  
> now have an ICC
> profile that can be used like above. The two Convert-to-Profiles  
> will tone any
> grayscale image in any desired way.
>
> Roy
>
> .
>
> 



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