Digital BW, The Print

I have been brushing up on some recent posts about QTR create ICC, and came across the 
following:

On Sept 14th.  Steve Kale wrote:

"The output is just fantastic. Linear L* output has all the problems we have debated under 
the QTR banner for the last couple of years (ie gamma shift)."

Could someone elaborate on this statement about problems with linear L*?  Being new to 
this world, I'd like to learn from history rather than repeat it.

Thanks.

Best.

Josh

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale <stevekale@b...> 
wrote:
>
> Hi Bob
> 
> Apparently not.  My understanding is it doesn't use the ICC profile.  See
> here for example:
> 
> http://photoshopnews.com/2005/05/16/epson-r2400-and-ultrachrome-k3-ink-repor
> t/
> 
> They have simply made the printer (within tolerances) linear L* from white
> point to black point at least for the Darker setting.  I assume the
> adjustment sliders/settings introduce changes to linearity/gamma and black
> and white points but I do not play with these.  I prefer to get it right on
> screen and don't do any adjustment in the driver controls.  At any rate
> though I use Roy's QTR create ICC profile to profile the luminance of the
> AB&W and use PS to convert to this profile on the fly before sending the
> (adjusted) file values to the printer.  The output is just fantastic.
> Linear L* output has all the problems we have debated under the QTR banner
> for the last couple of years (ie gamma shift).
> 
> Steve
> 
> 
> > From: Bob Frost <bob@f...>
> > Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> > Date: Wed, 14 Sep 2005 10:37:04 +0100
> > To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> > Subject: Re: [Digital BW] Re: Problems printing with R2400
> > 
> > Steve,
> > 
> > Surely the correct setting in CS2 for printing with AB&W in the Epson 2400
> > is to choose 'Let printer determine colors' in CS2. That means CS2 does not
> > do any color conversions, but does send the working-space profile with the
> > image for the printer to sort out in its AB&W routines.
> > 
> > Bob Frost.
> >
>