Digital BW, The Print

> What is jet grinding? I have been out of the busness for a long time
> now but for volume production horizontal and vertical (Morehouse)
> sandmills with lead crystal or zirconia shot were the way to go.
> Vibratory mills (Sweco?) were very good for small batches but output
> was low.
> 
> Are they milling the carbon at high viscosity (40,000+ cps)and
> letting down or are they working with more dilute solutions?
> 

The pigment is ground using high velocity air...the machine is incredibly
controllable so that you can get very precise grind distributions.  The
numbers that Jim Robbins quoted me...6nm...well its pretty incredible...but
I got out the Jet grinding field back in 1993...so I'm not surprised that
they have improved much since then...given it was state of the art then.
All the grinding would probably be done dry and then they would formulate
the ink.

Robert