Digital BW, The Print

Tim,

Give this a try. Just a starting point.

Convert a grayscale to RGB.

Create a Levels adjustment layer. Switch to the Red channel and set 
the center gamma slider to about 1.10.

Create a second Levels layer and set the Blue gamma to 1.10.

Vary the Opacity of the two adjustment layers to get the tone you 
want.

Unless your monitor is closely color calibrated there will be a lot 
of trial printing to get the tone you want.

Because of the lot to lot variations in ink and paper there is not 
firm point for these kinds of adjustments, or at least I have not 
found any yet. This method give more subtle control than just the 
channel adjustments. If you get a split tone, do tone selections and 
adjust those seperately.

No formula, but perhaps a place to start.

Martin



--- In DigitalBlackandWhiteThePrint@y..., tyork@a... wrote:
> Hi Allen,
> 
> Thank you for your suggestions. I would like to achieve a b/w with 
as 
> close to a selenium look as possible. I know that is difficult 
> because of it's subjectivity but I think you know what i mean. The 
> blue/purplish blacks and deep,rich grays that you could almost 
scoop 
> the gray out of. Paper plays a big part to the look I'm trying to 
> achieve, but if I can come close I will be happy.
>  Using the duotones will also allow me to print color when I 
> need/want to. If I can't get this then I will buy a second printer, 
> but that still wouldn't get me my selenium-toned prints. Thanks 
again.
> 
> 
> Tim 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@y..., allentakichi@e... wrote:
> > Tim,
> > 
> > The Blatner and Frasier book is invaluable 
> > for understanding color management and 
> > how photoshop works and I'd recommend it 
> > even if you had zero interest in duotones.
> > 
> > I get the feeling that you are actually 
> > interested in duotone simulations using the 
> > colored inks.  This and neutral printing with 
> > colored inks is probably the ultimate difficult 
> > thing to do well.  That's why a real duotone, 
> > tritone or quadtone solution is valuable.  
> > Harder to start but easy to print once set up.  
> > 
> > I did get Yarc to write a 6 color independent 
> > manual channel driver option for their RIP 
> > for the Spectratones before they kinda 
> > dissapeared.  
> > 
> > Anyway if you want to do duotone 
> > simulations, "just" get a neutral grayscale, 
> > the adjust the color cast in curves in the 
> > individual rgb channels.  It's direct, simple 
> > but difficult to do well image to image.
> > 
> > I doubt there is an easier answer.  
> > 
> > Allen Maertz
> > lincolninks.com
> > 
> > 
> > Message: 4
> >    Date: Thu, 02 Aug 2001 14:46:17 -0000
> >    From: tyork@a...
> > Subject: Duotone Workflows was Re: Tim 
> > York: re:papers
> > 
> > Martin, 
> > 
> > As I mentioned I e-mailed View Camera but 
> > they didn't know anything 
> > about the article. I'm not sure where to go 
> > now. I read Allen's 
> > comment to you but don't have the book. Oh 
> > well, C'est la vie.
> > 
> > Tim