Digital BW, The Print

BTW, I'm working with a PC running XP. I loaded the profiles in the 
Drivers folder -- same place the grayscale lab profiles are loaded, 
which do work. I can see the RGB profiles listed both when I choose 
to assign or convert, also when I choose a working space. Problem is 
after I select the profile I get the error message after I press OK 
to close the window. Also, I've tested the profiles with Qimage. Both 
RGB matte and photo profiles can be selected. Given that Qimage can 
embed printer profiles in saved/converted images, I just tried 
printing to file in Qimage (specifying QTR RGB Matte paper as the 
printer profile) a file saved in the Gray lab space in PS. When I 
opened the Qimage printed-to-file file in PS a message indicated that 
QTR RGB Matte paper was the embedded color profile but would not 
allow me to continue because the "embedded icc profile" is invalid. 
To continue I had to "ignore" the profile. I was left with an 
untagged document. The same file does open in QTRgui, presumably with 
the printer profile intact. I wonder if this means I can skip the 
step of working in RGB Lab space -- just stay in Gray lab -- and have 
Qimage do the job of converting to QTR RGB paper when it converts 
grayscale to RGB.

Chris Hargens




  --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy 
Harrington" <roy@h...> wrote:
> 
> 
> Does seem to be PS 6.   It works in PS 7 and PS CS but I also tried 
PS 6
> and it doesn't recognize any of the profiles.   Where did you get 
the
> error message?  I could get any way to even select it.
> 
> Roy
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Chris 
Hargens" 
> <chargens@s...> wrote:
> > 
> > I cannot convert/assign to the RGB Lab space. I'm getting an 
error 
> > message telling me that the icc profile is invalid. I'm running 
PS 6, 
> > but I don't think that should make a difference. I also 
experienced 
> > the same problem when I tried to change my working space to RGB 
Lab 
> > space.
> > 
> > Chris Hargens
> > 
> > 
> > 
> >   --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy 
> > Harrington" <roy@h...> wrote:
> > > 
> > > 
> > > I've added a set of the same basic Lab and Printing profiles 
that 
> > have
> > > been changed to RGB format.   These should be used for printing 
> > > using Qimage.  Set the printer output icc profile to one of the 
rgb 
> > profiles.
> > > I'm not positive how to change the file profile to RGB Lab in 
> > Qimage but it
> > > works fine in Photoshop.   
> > > 
> > > Note that the RGB Lab space is a true RGB space but it has a 
> > transfer function
> > > with linear Luminosity rather than a Gamma transfer function.   
It 
> > is not a
> > > space with an L, a, & b channel.  It might be interesting to 
use 
> > this for color work.
> > > 
> > > Roy