Hi, the officejet 6310 takes ink and can be ordered from most online stores like staples, cartridge world and amazon, All will vary in price, but always stick to the official HP inks although they are more expensive the compatibles do cause problems. below is a link to the cartridges you will need to purchase.
http://shopping.cartridgeworld.co.uk/home.php?cat=901Unfortunately i cannot attach files to this message otherwise i would put the manual on here, which on page 95 shows step by step on how to change the ink cartridges. I can email this to you if you provide an email address for me. below i have copied the instructions from the manual, but there missing illustrations, so might be a bit hard to follow. please let me know if you require any further help.Replace the print cartridges Follow these instructions when the ink level is low.Maintain the HP All-in-OneNote When the ink level for the print cartridge is low, a message appears onthe display. You can also check the ink levels by using the software installedwith the HP All-in-One.When you receive a low-ink warning message on the display, make sure you have areplacement print cartridge available. You should also replace the print cartridgeswhen you see faded text or if you experience print quality issues related to the printcartridges.To order print cartridges for the HP All-in-One, go to
www.hp.com/learn/suresupply. Ifprompted, choose your country/region, follow the prompts to select your product, andthen click one of the shopping links on the page.For a list of print cartridge numbers, see the back cover of this guide.Tip You can also use these instructions to replace the black print cartridgewith a photo print cartridge for printing high-quality color photos.To replace the print cartridges1. Make sure the HP All-in-One is on.Caution If the HP All-in-One is off when you open the print cartridge doorto access the print cartridges, the HP All-in-One will not release thecartridges for changing. You might damage the HP All-in-One if the printcartridges are not docked safely on the right side when you try to removethem.2. Open the print cartridge door.The print carriage moves to the far right side of the HP All-in-One.1 Print cartridge door2 Print carriage3. Wait until the print carriage is idle and silent, and then lightly press down on aprint cartridge to release it.If you are replacing the tri-color print cartridge, remove the print cartridge from theslot on the left.If you are replacing the black or photo print cartridge, remove the print cartridgefrom the slot on the right.Chapter 1096 HP Officejet 6300 All-in-One seriesMaintain the HP All-in-One1 Print cartridge slot for the tri-color print cartridge2 Print cartridge slot for the black and photo print cartridges4. Pull the print cartridge toward you out of its slot.5. If you are removing the black print cartridge in order to install the photo printcartridge, store the black print cartridge in the print cartridge protector or anairtight plastic container.If you are removing the print cartridge because it is low or out of ink, recycle theprint cartridge. The HP Inkjet Supplies Recycling Program is available in manycountries/regions, and lets you recycle used print cartridges free of charge. Formore information, go to the following website:
www.hp.com/hpinfo/globalcitizenship/environment/recycle/inkjet.html6. Remove the new print cartridge from its packaging and, being careful to touchonly the black plastic, gently remove the plastic tape by using the pink pull tab.1 Copper-colored contacts2 Plastic tape with pink pull tab (must be removed before installing)3 Ink nozzles under tapeCaution Do not touch the copper-colored contacts or ink nozzles.Touching these parts can result in clogs, ink failure, and bad electricalconnections.User Guide 97Maintain the HP All-in-One7. Slide the new print cartridge forward into the empty slot. Then gently push on theupper part of the print cartridge forward until it clicks into the socket.If you are installing the tri-color print cartridge, slide it into the left slot.If you are installing a black or photo print cartridge, slide it into the right slot.8. Close the print cartridge door.9. If you installed a new print cartridge, the print cartridge alignment process begins.10. Make sure you have plain paper loaded in the input tray, and then press OK.11. The HP All-in-One aligns the print cartridges. Recycle or discard the printcartridge alignment sheet.12. Press OK.