The ESC/P-R driver works as a filter program used with CUPS.

It offers high quality printing with Seiko Epson color ink jet printers.

This driver can only be used with printers that support the Epson ESC/P-R language.

For a list of supported printers by a currently installed package see the PPD files in this directory:

/usr/share/cups/model/manufacturer-PPDs/epson-inkjet-printer-escpr

For a list of supported printers by the newest available version at the upstream project visit:

http://avasys.jp/english/linux_e/

In particular regarding the ESC/P-R driver see:

http://avasys.jp/eng/linux_driver/download/lsb/epson-inkjet/escpr/

Regarding "What's ESC/P-R?" have a look at:

http://global.epson.com/innovation/universal_printing/index.html