P. 4-14 "print density" in "printer"), Print density" (p. 4-14), Sity] (p. 4-14) – Pitney Bowes RISO ComColor Printer User Manual
Page 160: Print density

4-14
ComColor Series User’s Guide 03
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Print density
Adjust the print density.
[-2]
Light
[-1]
Somewhat light
[0]
Standard
[+1]
Somewhat dark
[+2]
Dark
1
Select [Print density] on the
[Details] (or [Suspending]) screen
for the selected job.
The lower the setting, the lighter the print density.
The higher the setting, the darker the print density.