HP has introduced Instant Ink, an ink replacement service that can save customers up to 50 percent on Original HP ink. Ordered by your printer and delivered to your door, HP Instant Ink ensures that you’ll never run out of ink by ordering before you need it. HP Instant Ink began its nationwide rollout at Best Buy on Sunday, Sept. 22 and will be available on the HP Home & Home Office store and at hp.com/go/instantink on Oct. 1. Office Max will introduce HP Instant Ink nationwide in mid-October. Currently, eligible printers include the HP Envy 4500 series, HP Envy 5530 series and HP Officejet 4630 series.