What type of ink does the Hp 74 black in cartridge take? -

I have a HP C4280 printer that uses Hp 74 ink cartridges and I want to refill it my self. I heard that there are two types of ink but which kind does the HP 74 black ink cartridge take?

http://fillserv.com/inkjetcartridge.php?cartridge=hp-74#refillproducts