Epson 1500 - Manual (Page 35)

The illustration below shows an enlarged sample of a curve
printed with conventional laser technology and the same curve
printed with RITech.
RITech off RITech on
The RITech setting
The factory setting for RITech gives the best quality text and
graphics for nearly all purposes. It does not require you to set
or adjust anything. Occasionally, however, adjusting the
RITech setting with SelecType may further improve the print
quality.
For example, you may want to change the setting after you
replace an imaging cartridge or if you notice that your printing
is not as smooth and crisp as it should be.
To guide you in choosing the optimum RITech setting, the
SelecType RITech option prints a check pattern.
Controlling Your Printer 1-19