Digital BW, The Print

Dave,

I think the best example that shows that the surface reflective
characteristics are the main differences between matte and glossy papers
with respect to dmax is that an Arches Hot Press, un-coated print jumps from
about 1.5 to 2.5 with multiple coats of, for example, acrylic, applied to
its surface to give it a gloss.

The spectrophotometers we use for measuring dmax use nearly perfect lighting
that avoids the problems of reflections.  This gives the glossy papers a
huge advantage.  

In the real world, a matte print sitting on my desk top appears to have a
better dmax than a gloss print because the glossy print dmax is wiped out by
reflections.  That is, the nature of the lighting is what makes all the
difference.  If the display conditions are perfect, the glossy prints are
terrific.  If the lighting is bad, like a window behind the viewer, matte
wins.  

Of course, if one puts glass over matte, you may end up with the worst of
both worlds.  So, my favorite is a sprayed Semimatte with no glass.  But, I
think both types of prints are important, and being able to print either
matte or glossy is a critical part of any inkset I mix.

Paul
www.PaulRoark.com 


> -----Original Message-----
> From: DigitalBlackandWhiteThePrint@yahoogroups.com
> [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of
> davelongviews
> Sent: Wednesday, May 25, 2005 7:29 AM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Matte versus glossy dmax: a matter of physics?
> 
> There has been a lot of discussion over extended periods on the group
> regarding matte
> and glossy dmax. Is it true that light SCATTERED at the paper surface is
> what gives a matte
> surface its look, and that very same scattering is what reduces dmax? And
> with a glossy
> paper less light is scattered, more is REFLECTED, dmax is greater, and you
> have the
> glossyness to deal with. In other words isn't it true that you can't have
> a matte surface with
> a truely large dmax? Aren't paper surface/glossiness and dmax directly
> related in a way we
> wish they weren't? Is it physically possible to separate the two? Any
> thoughts?
> 
> Dave
> 
> 
> 
> 
> 
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