Lexmark MS421dn Toner Cartridges
Shop toner cartridges for your Lexmark MS421dn, which uses the Lexmark 56F6000, 56F6X0E and 56F6U0E toner cartridge series along with 56F0Z0E imaging units. Ink Depot has been supplying reliable consumables for this printer since Jun 2019. High-volume document workflows benefit significantly from moving from standard 56F6000 black cartridges to 56F6X0E extra high yield options. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance.
Expected page output and replacement cycles
High-volume monochrome laser printing relies on predictable output per cartridge. Standard 56F6000 cartridges suit moderate daily printing, while 56F6X0E extra high yield options suit heavy print environments. Page yields are measured in accordance with ISO/IEC 19752 standards for monochrome laser toner cartridges.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 56F6000 | Standard | Black | 6,000 | $0.056 |
| 56F6X0E | Extra High Yield | Black | 20,000 | $0.033 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Choosing between genuine and compatible cartridges
Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Installing high-quality compatible Lexmark toner cartridges provides significant cost savings for daily office printing without compromising print clarity or performance. Learn more about the differences in our genuine vs compatible cartridge guide.
Lexmark Imaging Units
The Lexmark 56F0Z0E imaging unit is a separate consumable rated for up to 60,000 pages, lasting through multiple toner cartridge replacements before requiring renewal.
Stocking strategy and delivery options
If you print mainly text documents, opting for 56F6X0E extra high yield cartridges offers the lowest ongoing printing costs. Compatible cartridges are backed by our money-back guarantee, detailed in our returns policy. Browse our full range of Lexmark toner cartridges to stock your office. Orders ship directly from warehouses in Perth, Brisbane, Sydney, Melbourne and Adelaide. Free delivery applies on all orders over $99.
Pro Tip
Track your page counts against the 60,000-page life of the 56F0Z0E imaging unit so you can order a replacement image unit alongside your next 56F6X0E toner cartridge to avoid unscheduled downtime.
Frequently Asked Questions
How do 56F6000 and 56F6X0E toner cartridges differ?
The 56F6000 is a standard yield toner cartridge producing approximately 6,000 pages, whereas the 56F6X0E is an extra high yield cartridge rated for 20,000 pages. Both physical cartridges share the exact same fitting dimensions and install into the same slot inside the Lexmark MS421dn.
Does the 56F0Z0E imaging unit come with toner included?
No, the 56F0Z0E imaging unit is a standalone drum assembly that transfers toner onto the page. Toner cartridges (such as 56F6000 or 56F6X0E) install directly into the imaging unit housing and are purchased separately.
When should I replace the imaging unit versus the toner cartridge?
The printer will display separate alerts for low toner and imaging unit life. While toner cartridges are replaced every 6,000 to 20,000 pages depending on capacity, the 56F0Z0E imaging unit typically lasts up to 60,000 pages, meaning it survives through several toner cartridge changes.
