HP Designjet 750c 755cm Ink Cartridges
Shop ink cartridges for your HP Designjet 750c and 755cm, which uses the HP 45 (51645AA) Black ink cartridge. Ink Depot has been supplying reliable consumables for these wide-format technical plotters since Aug 2026. Engineered for high-density line drawings and architectural blueprints, the 45 (51645AA) cartridge provides crisp text and consistent vector lines. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance.
Expected page output and ink capacity
Standard page yields for the HP 45 (51645AA) ink cartridge are calculated at 5% page coverage in accordance with ISO/IEC testing standards. For high-density CAD drafting or dark line fills, actual ink coverage will vary depending on plan complexity and print density.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 45 | Standard | Black | 883 | $0.15 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Stocking ink and delivery options
Keep CAD printing moving without interruption by maintaining replacement 45 (51645AA) cartridges on hand. If your primary output consists of technical schematics and line plans, keeping spare black ink ready prevents unexpected downtime during deadline submissions. Order genuine HP ink cartridges directly from our Australian warehouses located in Perth, Brisbane, Sydney, Melbourne and Adelaide for fast dispatch. Every purchase is covered by our comprehensive returns policy. Free delivery applies on all orders over $99.
Plotter ink purchasing insight
When ordering for wide-format plotters, verify that your drawing files use vector fills rather than heavy raster blocks whenever possible; raster imagery consumes significantly more black ink per page than line drawings.
Frequently Asked Questions
Do the HP Designjet 750c and 755cm use the same ink cartridges?
Yes. Both the HP Designjet 750c and 755cm plotters use the HP 45 (51645AA) black ink cartridge for standard monochrome plot printing.
How does printing complex CAD drawings impact the 45 (51645AA) page yield?
The published yield of 883 pages is based on standard 5% coverage. Detailed architectural plans, dense hatching, or dark line drawings often exceed 5% coverage, which reduces the total number of physical prints per cartridge.
Can I store unopened HP 45 (51645AA) ink cartridges long-term?
Genuine HP 45 cartridges have a long shelf life when kept sealed in their original packaging and stored in a cool, dry place away from direct sunlight. Storing backup cartridges ensures immediate replacement when plot runs run low.
Why is high-density black ink critical for technical plotters like the Designjet 750c?
Technical plotters rely on precise dot placement and deep black density to produce crisp line widths, fine text, and legible scale details on bond paper and tracing vellum.
