Digital BW, The Print

Hi Steve,

Sorry about the confusion.  What Daniel posted was a wedge in Lab space, i.e.
a 3 channel file with L, a, and b channels.  

What I've got is a completely new color space (or maybe more accurately a new
Gray space).   It's a single channel that is just the L channel.  Since its a single 
channel it can be used with grayscale images.

The idea, inspired by you, is to use the same flavor of space thoughtout -- use
a Lab-like space as the editting space as well as the print space.

From the .zip file you should get a .icm file.  You can load this as the Working
Gray Space in Photoshop.  So in "Color Settings"  for Gray Space you can
Load this file and use it as your working space. Alternatively you can use it as a
proofing space.   You can also Assign the profile to your grayscale files -- they
will inherently display just as they print with QTR -- builtin proofing!

Roy


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale <stevekale@b...> 
wrote:
> Roy
> 
> Ok now you are confusing me.  First of all, Load Gray won't let me select
> the extracted file.  Secondly Daniel posted a 21 step wedge in LAB ie each
> step represented a 5% change in L from 0 to 100 (Paul also sent me one
> directly).  I can leave my grey space the same (gamma 2.2) and few the LAB
> step wedge (colorsync manages this for me) and the eyedropper gives me the
> right LAB readings.  It is the image file that needs the right LAB pixel
> values.  
> 
> Steve
> 
> 
> > From: Roy Harrington <roy@h...>
> 
> > 
> > Well after writing that Photoshop didn't have a Lab oriented gray space,
> > I figured why not??
> > 
> > So this is an close approximation:
> > 
> > http://www.harrington.com/LabGrayscale.zip
> > 
> > Just download it and extract.
> > 
> > Then in PS Color Settings for Gray -- Load Gray and load this profile.
> > Its called Lab Grayscale.icm
> > 
> > Assign this Profile to your 21step or image.
> > Its not quite perfect, the 95 step is only Lab 4 but all the other steps are
> > right.
> > If this is useful I can probably make a perfect one later.
> > 
> > 
> > Roy
> >