Phil Rose - QTR calibration and x-810 densitometer
2005-03-06 by photoian@comcast.net
On my 4000 I get max blk at 65% so I don't think you're off base. I have a recently acquired X-Rite 810 and it does not have back illumination as far as I can tell. You can print out a manual from the X-Rite site if you don't have one. Ian