Riso HC5500 Series Reference Manual page 48

Other Useful Features
Reproducing Half Tones with Dot Density (Error Diffusion)
Half tones are reproduced by the density of compo-
nent dots. We recommend this setting to print pages
containing photographs.
For HC3R-5000, see User's Manual for Printer Driver page
2-21.
For PS7R-9000, see User's Manual for Printer Driver page
3-20.
Reproducing Half Tones with Dot Size (Dot Screen)
Half tones are reproduced by the size of component dots. We recommend this setting for images containing just
one or a small number of colours.
For HC3R-5000, see User's Manual for Printer Driver page 2-21.
For PS7R-9000, see User's Manual for Printer Driver page 3-20.
US/UK-46
70 lpi (lines per inch) 100 lpi (lines per inch)
The enlarged view is just an example image.