Digital BW, The Print

Jeff,
 
I changed a few values in that range, the 80% from 65 to 67 was just an
example. I won't be able to access my PC until this weekend (I'm at work
now), so I'll send you the modified curve probably next monday.
All I can say is that I first tried to modify the global RGB curve, but that
caused banding, whereas changing the Red curve gave no banding in the
various trials I ran.
 
Thanks again for your work,
Alessandro

-----Original Message-----
From: jrandall1149 [mailto:jrandall@...]
Sent: martedì 12 febbraio 2002 23.24
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] MIS Full Spectrum Partitioned RGB Quad Workflow


Alessandro:

I am glad the workflow worked so well for you!

Did you change any other curve values (other than Red 80% from 65 to 
67)?  Please let me know so I can test your changes with my printer.  
I have noticed that my printer "drifts" slightly from day to day.  
Also as you pointed out, there appear to be slight variations among 
printers.

Thanks.

Jeff Randall

Group:

The workflow and curves for PhotoShop (.acv) and curves for Picture 
Windows (.cc) are posted in __Files> Inksets, reviews and techniques> 
MIS FS> 1160 Partitioned Workflow__  of this forum.  

The curves are still draft and I will update them after I get more 
feedback.


--- In DigitalBlackandWhiteThePrint@y..., Alessandro Pardi 
<alessandro.pardi@i...> wrote:
> After a while,
>  
> I can happily report that I get great prints with this workflow, 
using a PC,
> an Epson 1160 with the Epson driver and EAM paper.
> I had to tweak the curves a bit, making the red (darkest gray) 
curve a bit
> steeper in the 80%-95% range, because the step-wedge print hadn't a 
very
> good separation in that area, but this may well be due to different 
printers
> samples. After that, my 1160 is able to brilliantly(1) print the 
Tyler's
> zees image, completely dotless, and with no apparent banding.
> I compared the step-wedge I printed with the Woolf's workflow, and 
there is
> a clear advantage with Randall's curves: no dots in the highlights 
(vs.
> visible, though absolutely acceptable, dots in the 5% with Woolf), 
no
> banding (vs. banding from 60% upwards), and even a deeper 100% 
black.
>  
> Please note that this report refers to the old FS inks: not the new
> reformulated inks, and not the FS neutral inks (so curves will 
probably need
> further tweaking for these sets).
> If anyone is interested, I can post the modified curves (or simply 
the
> values I changed: e.g.,  move 80% from 65 to 69).
>  
> Alessandro Pardi
>  
> (1) This means that I am able to see a Z in every square, although 
in some
> squares this is not so clear as in others.
> 
> -----Original Message-----
> From: jrandall1149 [mailto:jrandall@c...]
> Sent: Monday, January 21, 2002 02:53
> To: DigitalBlackandWhiteThePrint@y...
> Subject: [Digital BW] MIS Full Spectrum Partitioned RGB Quad 
Workflow
> 
> 
> I have developed a MIS Full Spectrum Partitioned RGB Quad Workflow 
> for Windows PCs,Epson 1160 Printer & Driver on EAM.  This might be 
> very useful for 1160 owners who want to try an RGB partitioned 
> workflow with the FS inks as an alternative to the Woolf lumped 
> grayscale workflow. The partitioned workflow takes full advantage 
of 
> the light, medium, and dark gray and black inks while the lumped 
> grayscale workflow combines the light, medium, and dark gray into 
one 
> mixed gray. 
> 
> The workflow and curves for PhotoShop (.acv) and Picture Windows 
> (.cc) are in ** Files> Inksets, reviews and techniques> MIS FS> 
1160 
> Partitioned Workflow ** of this forum.  The curves are draft and I 
> will update them soon.
> 
> Note:  You must be a member of this forum to download files.
> 
> Enjoy.
> 
> Jeff Randall
> 
> 
> 
> 
> Please visit the Group Homepage to check the Files, Bookmarks, 
Polls and
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> 
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