Epson WorkForce 320 325 Ink Cartridges
Your Epson WorkForce 320 325 uses the 133 / 138 cartridge series, featuring four individual ink units to ensure you only replace the specific colour that depleted. We have been supplying reliable consumables for this printer since Oct 2010. As demonstrated by our 4.8 Google rating, we are committed to providing premium consumable cartridges. Switching to the higher-yield 138 high capacity black cartridge reduces how frequently you clear maintenance cycles and printhead cleaning routines, saving ink over time.
Expected page output and replacement cycles
Standard 133 series cartridges yield up to 230 pages in black and 305 pages per colour, tested under ISO/IEC 24711 inkjet standards. Upgrading to 138 high-yield cartridges increases output to 380 black and 420 colour pages, reducing overall cost per page and physical cartridge swaps during heavy document runs.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 133 | Standard | Black | 230 | $0.034 |
| 133 | Standard | Cyan | 305 | $0.022 |
| 133 | Standard | Magenta | 305 | $0.022 |
| 133 | Standard | Yellow | 305 | $0.022 |
| 138 | High Yield | Black | 380 | $0.035 |
| 138 | High Yield | Cyan | 420 | $0.032 |
| 138 | High Yield | Magenta | 420 | $0.032 |
| 138 | High Yield | Yellow | 420 | $0.032 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Compatible cartridges.
Choosing between genuine and compatible options
Under Australian Consumer Law, using compatible cartridges does not void your printer warranty. Compatible 133 and 138 ink cartridges offer substantial cost savings without compromising daily document clarity. To understand how third-party cartridges perform against original manufacturer supplies, read our genuine vs compatible cartridge comparison guide.
Best way to stock these cartridges
If your office prints mostly standard black text, step up to the 138 high-yield black cartridge while keeping standard 133 colours on hand. If you regularly output colour charts, presentations, or multi-page reports, selecting full 138 high-yield value packs ensures balanced ink levels and lower running costs across all four slots. All compatible cartridges come with a money-back guarantee for peace of mind. Check our returns policy for details. Free delivery applies on all orders over $99 (conditions apply). We ship directly from fast-dispatch warehouses located in Perth, Brisbane, Sydney, Melbourne, and Adelaide. View our complete range of Epson ink cartridges to order today.
Pro Tip
You can mix standard 133 and high-yield 138 cartridges within the same print engine without error. Install a 138 High Yield Black alongside 133 Standard Colour cartridges if text document output far outweighs colour printing in your workplace.
Frequently Asked Questions
Why does my black ink run out faster even when I mostly print colour documents?
The WorkForce printing system uses the dedicated black cartridge to blend neutral tones, darken shadows, and crisp up text edges in full-colour documents. To prevent printhead clogs, small amounts of black ink are also drawn during routine automated cleaning cycles regardless of page content.
Can I install 138 high-yield cartridges if my printer originally came with 133 standard cartridges?
Yes. Both 133 and 138 series cartridges share the exact physical outer dimensions and fit identically into the printhead assembly. The 138 high-yield cartridge simply contains a larger volume of liquid ink inside the internal chamber.
What happens if one colour cartridge runs completely dry?
The printer will stop operating until the empty cartridge is replaced. Unlike single-cartridge systems, the WorkForce 320 / 325 requires active fluid pressure across all four individual slots (Black, Cyan, Magenta, Yellow) to prevent air from entering the microscopic nozzles and causing permanent printhead damage.
