Inkjet printers are cheap to buy, but expensive to run. Replacement cartridges can easily cost double the price of the hardware itself, leading many to decry the technology entirely. However ...

This allows is to fit flush between the cartridge and HP inkjet printer, intercepting traffic and presumably telling the printer some sweet lies so that you can go on with that print job rather ...

For example, a single HP 934 black toner cartridge ... which is about the norm for most cheap inkjet printers. As always, the bigger cartridges give you more ink and so the cost-per-page here ...

Durability is an issue with cheap printers, but ink costs will be your immediate concern. That generally has to do with the yield of the cartridge. A standard cartridge might have a CPP of seven ...