FIRMWARE, What does it mean?

CHIPLESS FIRMWARE on Epson Printers:

When you replace your Epson Printer Firmware for the Epson Chipless Firmware, you can use any kind of CISS or Refillable Ink Cartridges on those printer models that doesn't have AutoReset Chips developed yet, or you can avoid the use of CISS or Cartridges using the ARC Chips (AUTO RESET CHIPS).
Instead of using expensive Epson OEM Ink Cartridges - You can use third party Ink Cartridges, CISS or Refill your Cartridges using DYE inks, Pigment inks or Sublimation inks, like our SubliNova Smart Sublimation ink for Epson Printers.

The biggest advantage by using the Epson Chipless Firmware Solution, is that you'll never worry again by the printer not recognising the cartriges in the middle of your printing run. You'll never need to deal with reseting cartridges chip again, and you can keep using the same refillable cartridge until it worns out.

Here's a list of the Epson printer models that currently accept the Chipless Firmware Solution: