Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
<roy@...> wrote:
...
> If you were to go to 720x720 the 20pl dot would not be large enough 
> for a dMax black so you would need to use (8,20,40) and the lightest
> gray areas would show half as many bigger dots as the above cases.
> 
> So based on the dpi you pick, you must pick a large drop that is big
enough to
> give a dMax black.

So there is an obvious math relationship between a size 40 dot
grouping at 720 dpi, and a size 20 dot grouping at 1440 dpi.
I imagine physical oddities and realities of ink on paper though, so
they may or may not result in the same actual density and explain why
different dot size printers give different dmax, given various
ink/media characteristics.
Perhaps?
Tyler