Digital BW, The Print

Hi Roy;

Thanks for an informative response; perhaps you're right, that the 
question should be laid to rest, at least until next halloween when 
the_zombies_ will_ rise_ again... but a question first and an 
observation, and then I will shut up. 

First, how exactly is dither accomplished? how does a driver take 
one dot, make it several dots and what information is it using to do 
so?

And the observation: you said > I'd venture a guess that most 
all "real" pictures have less than 8 bits of "real data". Perhaps, 
but we routinely ignore the fact that silver granules convey 
information in more ways than just density: size, for one, which 
variable dot size partially reproduces, when it is used. Shape of 
the clusters, and sharpness of the edges; and perhaps even 
transparency for partially developed granules.  Much of this is not 
visible to the unaided eye, and perhaps not quantifiable, but it all 
contributes. 

Best regards,

Steven Karafyllakis