The wMinGray box contains the minimum percentage value that the Universal
Printer Driver can pass as an argument in the printer's gray-fill command.
Diconix 150 Plus
The wMinGray box is empty.
HP LaserJet IIP
For the HP LaserJet IIP printer, the minimum percentage of black pels is 1.
(This means that there is 1 black pel for every 99 white pels in the
minimum shade or fill pattern.)