How do i refill my hp printer cartridge # 27 and #28?

can you recommend a site that shows it in details?How do i refill my hp printer cartridge # 27 and #28?
http://www.oddparts.com/ink/help.htm#App鈥?/a>How do i refill my hp printer cartridge # 27 and #28?
Check this link for instructions
The above sites will work for u..I guess,


but here is how- pretty easy- just first make sure u check the content of the cartridge before starting, u need some prinitng ink, sth to insert with and a steady hand:)


insert the ink slowly and always a bit less then it says on the cartridge, a test page will be needed...:)


Refilling a cartridge more than 2 times most probably will damage quality, so consider buying one too- some come up pretty cheap


http://bulgle.com/L/L/000.php
I would not advise doing it. People run into all kinds of trouble. TRy ink4jets. It is almost as cheap as refilling.