I don't want to be an apologist for HP or any other printer manufacturer, but there is at least one point that seems to be missed in this debate. If I design a printer, whether inkjet or any other type, I probably design it to some pretty tight tolerances in terms of the ink or toner. So I probably don't want people to drop in cartridges where the manufacturing tolerances might be way off the mark as they might well cause issues with the performance. That I as the manufacturer might be asked to fix, also possibly gaining a reputation for poor quality in the process. Yes, you might reasonably point out that OEM cartridges are expensive, but it's far from a monopoly out there, isn't it? In some ways, the expense of printing could be considered to be a good thing. Because it's a disincentive to the production of waste paper. Just my 2 cents worth :)
I'm not sure that approach would be sustainable. Printer manufacturers are in the business of loss leading as far as I can see. They probably don't make any significant profit on the printer itself, judging by what I've paid for printers in the last few years. The price of the printer is subsidised by the projected profits from the ink/toner. And they are not insignificant, I agree. But in the current market, selling printers at an unsubsidised price probably won't work commercially. We've gotten used to cheap printers and expensive ink/toner I guess and it's difficult to come off them. There'[s no such thing as a free lunch etc..
A Color Laserjet can be bought for roughly $450. A high-capacity replacement for all 4 toner cartridges will cost just over $700. That makes my Laserjet disposable - once the toners are nearly empty, I will sell it on eBay and replace mine with a new one.
A good point. However, if, for example, the quality of the output is poor, I think that most people would not be sufficiently technically informed enough to be able to point to the printer head as the source the problem. Even if they do, there may well not be a brand sticker on the printer head. To most observers, then, it would be the printer that was faulty. Most printer manufacturers are protective of their brand images and don't want negative associations with that brand. Reasonable enough, as far as I can see. Let's face it, most branded ink or toner is expensive irrespective of brand. The best way of reducing printings costs? Probably just print less.
The way around this could be to have the printer validate new cartridges through a test print, with eventually internal sensors to raise errors as needed. That would be to me the cleanest way for HP to handle third party ink.
