Now I have on several occasions bought these cartridges. At some point I even started a tally to lead, because my page number is still occurred quite low. Here are my results:
Pressure setting:
- Only Black / Print Quality Normal
- Usage period 25.10. - 05.12.2012
- 258 pages!
- Only Black / Draft Fast (to consume a few ink)
- Usage period 05.12.2012 - 01.02.2013
- 297 pages!
Conclusion: liquid gold for printing would be significantly cheaper.