Digital BW, The Print

So you start with, say, a GG2.2 image file that has pure black in it when
looking at the histogram.  You then convert to a QTR ICC profile, say one
you made for HPR, and then you look at the histogram again and your black
point is not pure black?  That can't be because pixel value 0 is not
affected by the transform in the profile - it stays at 0 and is sent to the
printer at which point it produces maximum black.


> From: Olivier <odesmais@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Sun, 19 Feb 2006 17:29:38 -0000
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: Re: [Digital BW] QTR-ICC BPC & Pure Black
> 
> Hi Steve,
> 
> Yes you totally right.
> Still, I'm puzzled at seeing that when the Levels/alt+click routine is
> run black is not at pure black. Is this a QTR-ICC issue or a PS one,
> the former one seems the most likely one.
> 
> This would still mean the file does not have 100%K values when sent to
> QTR : isn't it strange. Pure Black seems to be mapped to paper blackest
> reproduceable tone at the file level, e.g. the driver does not get a
> 100%K value fed in.
> 
> Olivier
>