QTR-Quadtone RIP

If you shoot the picture in color there's certainly some benefit in retaining that
color info in Photoshop.   But the actual input to QTR is always grayscale.  If you send
a color image a conversion to grayscale is done automatically using a simple default
conversion.  I think in general you'd benefit by controlling that color-to-gray
conversion using Channel Mixer or other techniques.  If you do that, you get an RGB
file that is gray i.e. R=G=B.  This contains no more information than a grayscale image.
It will be identical data but three times the size.  The print result will be identical.
Whether or not you explicitly convert or not is just a matter of convenience.

Roy

--- In QuadtoneRIP@yahoogroups.com, Alan Kearney <akearney@...> wrote:
>
> Doug, I'm no expert but I think it does matter and that there is more  
> image information left in an RGB image than a Gray Scale. That's how  
> it was explained to me in a community college Photoshop class and  
> that how I've been doing it, with great results.
> 
> Alan
> 
> On Feb 5, 2006, at 10:41 AM, Doug Walker wrote:
> 
> > Thanks Alan.
> >
> > I guess my pondering came upon seeing in Uwe Steinmueller review of
> > Roy Harrington's QuadTone RIP where the steps which included a
> > Greyscale image in Print with Preview with a source Grayscale 2.2,
> > not an RGB.
> >
> > So it does not matter?  RGB or Grayscale?  Is one better than tother?
> >
> > Doug Walker, FP
> > "Specializing in Corporate People in their Workplaces in a Clean,
> > Bold Classic Style!"
> > website: http://www.walkerphoto.com
> > Phone (360) 943-1293
> > Olympia, WA
> > member- American Society of Media Photographers, Inc. (ASMP)
> > member-Professional Photographers of Washington (PPW)
> >
> >
> > On Feb 5, 2006, at 9:51 AM, Alan Kearney wrote:
> >
> > > I print RGB's straight to my Epson 4000 with QuadtoneRIP and they
> > > look great!
> > >
> > > Alan
> >