Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Bob Frost" 
<bob@...> wrote:
>
> Forgot to say that these grey patches were printed using the 
PhotoRPM 
> setting of the R800 printer (5760x1440).
> 
> Bob Frost.


What did you use to collect the data stream?