How to properly replace ink cartridges?

How do i replace ink in hp cartridges?

• Answer:

  Prepare the CartridgePurchase an ink cartridge refill kit. Refill each empty section of ink in your HP cartridge as quickly as possible so that the sponge does not dry out. Use a ball-point or other sharp-tipped pen to pierce the refilling hole of your HP cartridge.Fill the CartridgeUse the syringe included in the kit to draw up approximately 10 millimeters of the first ink to be refilled. Insert the tip of the syringe into the refill hole until you feel some resistance. Use steady, moderate pressure to fill the HP interior sponge with ink.Test the CartridgeReinsert the HP cartridge into your printer. Choose a picture or some text that prominently features the replaced color. Print out the picture or text and check that the ink is processing correctly.Source:http://www.cockeyed.com/science/refill/refill.html