HP DeskJet F350 Ink Cartridges
Your HP DeskJet F350 uses the HP 21 black ink cartridge for everyday text documents. The DeskJet F350 is a compact all-in-one inkjet printer built for basic home document scanning, copying, and printing. Ink Depot has been supplying reliable consumables for this printer since Sep 2026. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance. Installing genuine HP 21 (C9351AA) cartridges ensures clean output without thermal printhead clogs.
Page yield and output expectations
Standard ISO/IEC 24711 testing procedures determine ink cartridge page yield ratings under controlled conditions. Actual print output on your HP DeskJet F350 varies based on text density, document coverage, and printing frequency.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 21 | Standard | Black | 185 | $0.24 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Managing your ink supply and orders
If you print mainly text documents, keeping a spare HP 21 (C9351AA) black cartridge on hand prevents sudden workflow stops. Replacing cartridges promptly keeps the integrated printhead fresh for clear black text. Every purchase is covered by our returns policy if you need assistance. Free delivery applies on all orders over $99, dispatched quickly from our warehouses in Sydney, Melbourne, Brisbane, Perth, and Adelaide. Browse our full range of HP ink cartridges for all your printing needs.
Pro Tip
The HP 21 cartridge features an integrated printhead built directly into the ink unit, which means replacing the cartridge automatically renews the print mechanism and prevents old ink buildup.
Frequently Asked Questions
Why does the HP 21 cartridge include its own printhead?
HP designed the 21 series with an integrated printhead on the cartridge base. Replacing the cartridge installs a brand-new nozzle assembly, eliminating long-term printhead wear and maintaining crisp black print quality.
Can I leave an empty HP 21 cartridge in the DeskJet F350 for extended periods?
It is best to replace an empty cartridge immediately. Leaving a depleted integrated cartridge installed can allow leftover ink to dry around the contact pins, potentially causing electrical recognition errors when a new cartridge is inserted.
How does document coverage affect the actual output of my HP 21 cartridge?
The standard 185-page yield is measured at 5% page coverage, typical for basic letters or invoices. Printing dense text, bold headers, or graphics uses significantly more ink per page, reducing overall page count accordingly.
