Manufacturers approach the technology from slightly different directions, but the end results are usually pretty similar.
There are two dominant ink types in use on today's inkjet models -- dye and pigment.
In fact, according a study – “Inkjet prices, Printing Costs and Consumer Welfare” – written by Tele Nomic Research and released by the American Consumer Institute, not only are inkjet prices exorbitantly high, but they have, by one estimate in the study, increased many times faster than the rate of inflation.
The combination of the lack of price competition and barriers to entry has resulted in a concentrated market, as depicted below.
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If you have the A versions of the ink cartridges you can't refill them.
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If I can't get a workaround, I'm going to give this unit away as this is ridiculous and I'll never buy any HP products in the future as I see what they're up to.
Now, I've looked on the Internet and had found that by removing the printer battery (it's supposed to be near the carriage), you can do away with the the ink expiration issue and that some say that you can refill the 02 color cartridges regardless of the chip but I'm not clear how effective that is.