Digital BW, The Print

Carl 

I don't see the comparison but I would guess that what you are seeing makes
sense in that the profile is attempting to correct for poor linearity of the
Epson driver on HPR.  I'll print and measure a 51 step wedge with the 4800
ABW driver (without a profile) to HPR and post the results.

Steve


> From: Carl Schofield <scho@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Fri, 21 Oct 2005 13:42:19 -0400
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: Re: [Digital BW] ICC v. Transfer Function in Epson driver
> 
> Steve,
> 
> I seem to be getting results that are different from what you are
> seeing.  Below is a comparison of density and Lab-L, with and without
> icc profile.  Printed with 2400, MK, Hahnemuhle PR BW, using default
> ABW neutral-darker settings and 2880 dpi (RPM).  QTR gray lab working
> space.  Create-icc (2.3.2) used to make the icc profile form the new
> step-wedge (10, 5, 1 % steps), but standard 21 step used for print
> with the icc applied.  Note that without the icc there is some
> compression in the shadow region that is improved with the icc.
> 
> Carl
> ??
> On Oct 21, 2005, at 12:55 PM, Steve Kale wrote:
> 
>> I have posted a pdf file at the link below with the results of some
>> QTR
>> Create ICC tests I ran comparing a linearised QTR neutral curve mix
>> (technically the individual curves were linearised not the mix)
>> without an
>> ICC profile, the same mix with an ICC profile generated by QTR
>> Create ICC
>> and the Epson driver with a colour GM Eye One Match generated ICC
>> profile.
>> The relevant file is called Colour Management Tests.
>> 
>> http://homepage.mac.com/stevekale/stevekale2/FileSharing37.html
>