Digital BW, The Print

Luminance is a very well defined term.  Don't get me wrong, I understand
that there is something that you are attracted to with black only and that
something is real.  It is not "luminance" though.  Prints don't luminate,
they reflect light when illuminated.  Reflectance can be measured as can
luminance.  It's not a put down and I tried to make myself clear in the
earlier post.  I think you take offence too easily but then that's just my
opinion.  Just continue to have fun.  :-)


> From: Clayton Jones <cj@...>

> 
> 
> 
>> ...kind of a Goldilocks situation where you want smoothness but
>> not too much.  I say "mystical luminance" because while a
>> greyscale made of just one ink versus several can have the same
>> luminance (in a technical sense) there is some quality about
>> the former which you prefer.
> 
> It's interesting that you apply "mystical" to something which you
> don't personally perceive (as if to imply that your knowledge is so
> superior that if you don't perceive it it can't possibly be true), and
> continue to rely on technical theory for everything, which may be an
> explanation for why you don't perceive some things and continually use
> expressions such as "I can't possibly understand why..." or "I can't
> imagine that anyone..." or "I simply can't believe that..." (see
> above) and so on, in your posts.  You have a pattern of applying these
> subtle put-downs (and sometimes not so subtle) to things other people
> say here.  There are some people who have been insulted to such a
> degree that they avoid this forum now because of it.
> 
> One thing that I and many others love about BO and refer to as
> luminance, and which is clearly visible to us, is nothing mystical at
> all.  It is very simply that bare uncovered paper surface is allowed
> to show through between the dots.  This paper surface has a reflective
> quality that imparts a wonderful glow to the print.  When anything
> covers it (even something clear or light enough that the "whiteness"
> may read the same on an instrument), this reflective quality is
> diminished and the difference shows - it's the "veiled look" that I
> refer to.  It's really that simple.  The degree of it varies among the
> different full ink systems, and it is clearly noticeable to anyone who
> is used to the sparkling glow of BO prints.
> 
> The QTR/2K prints that some are experimenting with so far seem to
> preserve the luminance quite nicely.  Steve Karafyllakis is doing
> some gorgeous stuff that way.  The problem he's encountering is
> finding an LK mix that will work satisfactorily on different papers.
> That's proving to be the real challenge.  The 2K part has proven
> itself.
> 
> 
> Regards,
> Clayton
> 
> 
> Info on black and white digital printing at
> http://www.cjcom.net/digiprnarts.htm
> 
> 
> 
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