Digital BW, The Print

Hi Pieris,

The 21 step grayscale fits in with the Photoshop curve. Each step 
corresponds to a line in the curve dialog or exactly between the 
lines. To use anything other than the 21 step you'd have to come up 
with a way to map your step to a particular position in the PS curve.

I'd be nice if Photoshop provides a way to customize the curve 
dialog. However using a single dialog design it's easier for people 
to share and modify curves.

--nick

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Pieris 
Berreitter" <pieris@y...> wrote:
> 
> Technical question. I've got this 21step.tif file and I'm dying to
> know why the steps are in 9% increments. Step wedges that I create 
> by hand (gradient, blur, posterize=21) give 5% per step. All this 
> time I was printing this image out and I thought I was getting 5% 
> per step, and I'm not.
> 
> I'm just trying to do my own profile for BO printing, since nobody 
> has offered one. Can anyone give me a reason to continue using 
> 21step.tif?
> 
> -Pieris
> digital darkroom blog: http://www.pmb.net/darkroom