QTR-Quadtone RIP

Hello Roy.
I should have asked you about why perceptual intent makes a difference
with the icc on B&W instead of asking Jeff. I understand why with full
color but am missing something with low gamut inks. Could you explain
a bit?

Regards
Duane


--- In QuadtoneRIP@yahoogroups.com, Roy Harrington <roy@...> wrote:
>
> Hi Jeff,
> 
> If you are seeing a drop in dMax using the ICC profile, the profile 
> conversion is probably being
> done incorrectly.  It sounds like RelCol conversion instead of 
> Perceptual.
> 
> I can't tell whether you are on a PC or Mac but Photoshop often 
> defaults to
> Relative Colormetric conversion rather than Perceptual Intent.   Be 
> sure to double check that you
> are using Perceptual and using Black Point Compensation.
> 
> Roy
> 
> On Wednesday, August 23, 2006, at 11:01  AM, Jeff Kohn wrote:
> 
> > From what I'm seeing so far, I think it's best to just use the ICC 
> > profiles for soft-proofing and not printing. I'm finding that
printing 
> > an image using the "QTR Gray Lab" profile yields better results than 
> > using a Create-ICC generated profile with perceptual intent. The 
> > latter lightens the print noticeably, and really kills the DMAX of
the 
> > print (dropping it from 1.6 to 1.3 in the case of my custom curve for 
> > Hahnemuhle Photo Rag that I'm currently working on).
> >  
> > I've been meaning to post a discussion about this and will try do so 
> > in the next few days. First I want to finish tweaking my custom curve 
> > and do a bit more testing/measuring.
> >  
> > Jeff
> >  
> >
> <image.tiff>
> >
> > From: QuadtoneRIP@yahoogroups.com
[mailto:QuadtoneRIP@...m] 
> > On Behalf Of dlruckus
> > Sent: Wednesday, August 23, 2006 12:37 PM
> > To: QuadtoneRIP@yahoogroups.com
> > Subject: [QuadtoneRIP] Re: Printing with ICC profiles
> >
> >
> > Hi Joe.
> > You need to convert to profile before printing.
> >
> > Regards
> > Duane
> >
> > --- In QuadtoneRIP@yahoogroups.com, "joemulligan_68"
> > <joemulligan_68@> wrote:
> > >
> > > Since the Yahoo search is not the most efficient, I hope to ask this
> > basic question:
> > >
> > > How do you print using icc from QTRgui?
> > >
> > > I have been successful with the Create ICC program while printing on
> > Mac but since I am now
> > > running bootcamp and Windows, how do I go about this with QTRgui?
> > >
> > > Should I Assign Profile to the file and then print? Or should I
> > Convert to Profile?
> > >
> > > A bit confused at the moment. Thanks to all in advance.
> > >
> > > JoeM
> > >
> >
> > 
> -
> Roy Harrington
> roy@...
> Black & White Photo Gallery
> http://www.harrington.com
>