Digital BW, The Print

How to use the channel mixer depends on what film you're working with: with
B&W film (which I was referring to in my post) all you want to do is select
the sharpest channel (if there's a significant difference in your scans,
this is hardware dependent), so you check the monochrome box and set 100% in
the channel you want, and 0% in the others (Ctrl+1, +2 or +3 are the
shortcuts for this operation).
Working with color film is completely different, though, as in converting
from color to B&W the three channels typically hold very different
information, so mixing in different percentages may be better than getting
100% from one channel. For maximum flexibility you can save the three
channels as 8bit layers and then mask them (a PS action can do it
automatically, so that you feed it a RGB scan and end up with a grayscale
file with the three original channels as three layers).
 
Alessandro

-----Original Message-----
From: cliffordfeller <cwfeller@...>
[mailto:cwfeller@...]
Sent: venerdì 31 gennaio 2003 21:50
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Black and White Workflow


--When you say convert to grayscale in channel mixer do you mean 
check the monochrome box then manipulate the sliders for each 
channel and the save? Is this better then using levels and curves  
to convert the RGB data to monochrome? I am using Imageprint on an 
Epson 2200 and getting great black and white. Thanks
Cliff
- In DigitalBlackandWhiteThePrint@yahoogroups.com, "cschaible94111 
<cschaible@c...>" <cschaible@c...> wrote:
> Allesandro:
> 
> Why not just scan as grayscale in Vuescan?  Is it because you want 
to 
> save the raw scan data?
> 
> Chuck
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Alessandro 
Pardi 
> <alessandro.pardi@i...> wrote:
> > What I do with B&W film is get a raw scan from Vuescan 
(therefore 
> as RGB),
> > invert in PS, and then look at 100% magnification to see which 
> channel is
> > best. With my Canon FS4000 the green channel is always the 
> sharpest/least
> > noisy, so I apply the channel mixer, convert to grayscale, apply 
> levels, and
> > finally convert to 8bit mode to start playing with layers.
> >  
> > Alessandro Pardi
> > 
> > -----Original Message-----
> > From: cliffordfeller <cwfeller@m...>
> > [mailto:cwfeller@m...]
> > Sent: venerdì 31 gennaio 2003 15:48
> > To: DigitalBlackandWhiteThePrint@yahoogroups.com
> > Subject: [Digital BW] Black and White Workflow
> > 
> > 
> > I am scanning Tri-X on a Nikon 4000ed with Silverprint as an RGB 
> > positive file .I am then inverting and converting in Photoshop 
> seven 
> > using image invert ,levels ,curves and sometimes channel mixer. 
> > Which is the best technique scanning  as an RGB or Grayscale?
> > If I scan as RGB where is the best place to do the conversion to 
> > monochrome ( Channel mixer check box monochrome ?)I have 
difficulty 
> > getting a good black and white conversion in levels and curves 
> > alone.My monitoris a  Lacie and it is calibrated  withOptical.
> > Any comments would be appreciated.
> > Thanks,
> > Cliff
> > 
> > 
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