“Quelle surprise,” you might exclaim sarcastically, and you’d be right. However, as it turns out the waste is worse than you might expect. A few head cleanings and you’ve wasted more than twice as much ink than what comes in a single cartridge.
In round numbers, the cylinder is 40 mm ID and the cap is 20 mm tall. Volume of a cylinder is πr2h, so you’re looking at 25×103 mm3 of waste ink.
Seeing as how 1 mm3 = 0.001 ml, the tank currently holds about 25 ml of ink!
The printer has six cartridges. Assuming head cleanings drain an equal amount from each cartridge, that’s 4 ml apiece. Given that the large OEM ink cartridges come with 11 ml of ink, you can do the math: a third of a cartridge of each color just for head cleanings so far.
Assuming that the cartridges are at or around 11mL in my older Epson Stylus Photo R220 model as well, the amount of waste is likely very similar for my printer. I can’t find any indication of measurements, whether cubic or otherwise, on my cartridges: presumably because you’d realize just how little there is in those cartridges if it were indicated properly.
Combined with idiotic default settings that make you waste ink and paper, and ludicrous region restrictions that may make you waste ink, owning printers sure amounts to an awful lot of fun.