^you can buy it from here
http://cgi.ebay.in/PRINTER-CARTRIDGE-INK-HP-CANON-LEXMARK-REFILL-115ML-x-4-/230490440887?cmd=ViewItem&pt=LH_DefaultDomain_203&hash=item35aa4d04b7
Search "hp60 refill" in youtube you will see many video tutorials, HP818 is known as HP60 in usa, hp300 in uk, hp121 in japan, if u search abt hp818 u wont see much tutorials, so search for hp60, this different naming is another trick frm hp to limit the information shared among its customers...
New hp Printers wont print if the refilled cartridge is emptied previously. Its very difficult to erase the memory, that why no method havnt surfaced yet
If low ink warning didn't come up yet, Refill your cartridge with 3~4ml of ink as soon as possible.
Hp818 can be refilled many times if...
You cant reset hp 818 cartridge, one shud refill hp818 before the ink runs out completely, refill the cartridge when the ink level reaches last level.
If ink runs out, hp printer detects it and says cartridge out of ink ,this information(out of ink) is stored in cartridges flash memory , and...
^Nice info there, So that means HP can easily create a cartridge which wont print after a particular no of pages have been printed, and refilling wont work,isn't?
So why they didn't do such a trick with new cartridge like hp60?
No, by using inksaver software i dont need to refill the cartridge often(low volume 4ml cartridge like hp60).
Not only it saves ink, there is increase in print quality and lower sound frm printer.
Ok, problem solved somehow, now its working flawlessly.
Now i need a "Printer Page counter" software, which will show total no of pages printed, Please suggest some....
Yea, but unfortunately the hp cartridge with my printer uses a chip which is causes problems after refill, like not showing...