Dark Enterprises

Type & Compatibility

• A solvent-based, black pigment ink cartridge engineered for non-porous substrates such as films, BOPP, PET, aluminum foil, and more 

• Built upon HP 45si cartridge technology with an integrated Smart Card for intelligent functionality 

• Ideal for coding and marking operations where durability, fast drying, and intermittent start/stop printing are critica

Model: HP 45 (also known by part numbers 51645A, 51645AA, or 51645AE).

Ink Type: Pigment‑based black ink, designed for sharp text, water‑resistance, and fade resistance, delivering professional-quality prints.Print Resolution: Up to 600 × 600 dpi.

Page Yield: Approximately 930 pages (tested under HP’s methodology).Print Technology: HP Thermal Inkjet.

Ink Volume: Approximately 42 ml.

Reliability: HP reports this cartridge as being 9 times more reliable on average compared to leading remanufactured alternatives.

Sustainability: Contains ~40% recycled plastic, and supports HP’s Planet Partners recycling initiative.

Model: HP 51604A (also referred to as the Black Plain Paper Print Cartridge)

Ink Technology: HP Thermal Inkjet with self-contained printhead and ink reservoir 

Ink Volume: Approximately 3 mL Yield: Rated for about 750,000 characters (not pages), which is HP’s way of measuring output for certain industrial or plotter-like applications . Roughly, this may translate to just a few hundred pages depending on coverage.

Nozzle & Resolution: Equipped with 12 nozzles, providing around 96 dpi resolution and a 1/8‑inch swath width

Compatibility: Works with several legacy HP models, including:

• QuietJet, QuietJet Plus, ThinkJet, ScanJet N9120,

• DeskJet (models 5940, D4145/D4155/D4160),

• OfficeJet 6310,

• PhotoSmart series (2570, 2575, 8050, C4140–C4180, D5060–D5160) Environmental & Reliability: Meets HP’s quality standards and is covered by HP’s standard defects warranty