Epson STYLUS PRO WT7900 Reference Manual page 28

Epson MicroPiezo TFP print head technology allows the printer to use two built-in
cleaning cartridges to automatically maintain the printer for consistent operation
One cleaning cartridge is used to remove the Hollow Organic Resin Particles from the
printing mechanics if left idle for a certain amount of time
The second cleaning cartridge is used to automatically maintain the ink waste system,
while the printer is active
With this technology, the Epson Stylus Pro WT7900 is automatically maintained with
very little user interactivity
White Cleaning Conversion
White to Cleaning Fluid
Cleaning Fluid to White
Specifications may change depending upon how long the printer is idle between printing.
Epson MicroPiezo TFP Print Head Technology
Automatic Print Head Maintenance and Cleaning System
Conversion Time
~2:07 min:sec
~2:17 min:sec
Ink/Fluid Used
~3.12 ml
~3.12 ml