Digital BW, The Print

Yes what you say is correct.  As set up at the moment, a 255 pixel (or
normalised pixel value of 1) goes to paper white 0.043 and 0 pixel to 1.65.
But note that the gamma of such a range is completely different from the
workspace gamma.  In the workspace gamma we go from density values of 0.043
to 1.65 in pixel values of 243 to 45.  This is my point.  As a result, we
work in a tonal range of 0-255 with a gamma of 2.2 yet print with a device
which has a tonal range of 45-243 and a gamma of lord knows what....No
wonder we don't get a WYSIWYG output.  Better to deliver the printer a tonal
range it can handle (43-293) and have it calibrated to the same gamma as our
workspace. No?


> From: Tyler Boley <tyler@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Thu, 02 Dec 2004 16:20:01 -0000
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: Re: [Digital BW] Tonal range and linearization
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale
> <stevekale@b...> wrote:
> 
> snip...
> 
>> For EEM which I will say has a density range of 0.043 to 1.65, this
> range is
>> approximately, using the 0-255 scale, pixels from 18 to 243, assuming a
>> gamma of 2.2.  Anything outside this range can't be reproduced...
> 
> 
> Steve, perhaps you correct yourself later in the post (sorry, out of
> time) but this is incorrect.
> The entire path from numbers exiting Photoshop to ink hitting paper
> does not clip as you suggest.
> 
> 255 winds up mapping to your 0.043 paper, and 0 to your 1.65 ink
> black. All in between is "compressed" accordingly. If you have
> clipping such as you imply, there are other problems. The nature of
> the compression is determined by your entire workflow and device
> characteristics.
> 
> Tyler
> www.custom-digital.com
> 
> 
> 
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