Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Editor 
P.O.V. Image Service" <editor@p...> wrote:

> ... it really seems like the 
> life raft for those clinging to the hope of a printer NOW  that 
> does great archival color imagery AND can do great neutral 
> non-metameric B&W  images..  We just aren't at that point 
> yet.


and someone else wrote (sorry, forgotten te name):

> I print B&W using ImagePrint on the 2200 using matte papers 
>  and matte black ink.  No metamerism, no bronzing.  

Mmhh, I see that metamerism is no longer a big issue if you 
print b&w with the Ultrachromes using ImagePrint. On  the other 
hand, I would  n o t  claim, that there is absolutely no 
metamerism with that combo.
If you print b&w using black inks  a n d  color inks in what mix 
ever, there should be at least some metamerism. This seems to 
be a physikal rule, no?
I mean, if there exist colored dots on a print, e.g. cyan and 
magenta, those dots will reflect different  frequences of the light.
Speaking simplified: the cyan dots are not able to reflect warm 
light, while the magenta dots are not able to reflect cool light. 

So, having an appropriate mixture of black, cyan and magenta 
dots, the overall impression in a given light-surrounding might 
be "dead" neutral, but this impression  m u s t  change  in 
different light conditions (cool lihgt, warm light), - the amount of 
changing should be dependent on the amount of cyan and 
magenta dots being used.

I think this is hardly visible in IP/Ultrachrome B&W prints if you 
don´t compare them to others, but in a side by side comparison 
to a print without metamerism (quad- or silver print) they  do 
change their appearence during the day.

Bernd