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Original HP 70 Light Magenta and Light Cyan Printhead (C9405A)
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Factory dual-color thermal inkjet printhead delivering 4 pL drops for Light Magenta and Light Cyan in HP DesignJet Z-series photo plotters.
OEM Replacement Component
Original HP 70 Light Magenta and Light Cyan Printhead (C9405A)
OEM Part Number: C9405A (HP No. 70) | Dual-Color Thermal Inkjet (TIJ 3.0) Replacement Printhead
Product Overview
The Original HP 70 Light Magenta and Light Cyan Printhead (C9405A) is an authentic original equipment manufacturer dual-color thermal inkjet (TIJ) printhead component engineered specifically for HP DesignJet large-format photo and graphic production printers. As a foundational element within HP’s 6-color, 8-color, and 12-color Vivera pigment ink systems, the C9405A printhead governs light-density primary color delivery, enabling grain-free photographic highlight transitions, smooth skin tones, neutral pastels, and subtle sky gradations without visible dot structure.
Housing 2,112 active nozzles (1,056 nozzles dedicated per color channel across dual interleaved arrays), the HP 70 C9405A printhead deposits calibrated 4 picoliter (pL) micro-droplets at native print resolutions up to 2400 × 1200 optimized DPI. Equipped with HP’s built-in Smart Printing Technology, the onboard cryptographic EEPROM continuously communicates with the carriage electronics to monitor nozzle health, dynamically compensate for thermal shifts, and execute automated drop detection and remapping. Built for use with HP Vivera pigment inks, the printhead ensures exhibition-grade lightfastness, water resistance, and consistent image stability across fine art papers, photo gloss, satin films, and canvas media.
Part Information
| Product Name | Original HP 70 Light Magenta and Light Cyan Printhead |
| OEM Manufacturer | HP Inc. (Hewlett-Packard) |
| OEM Part Number | C9405A (HP 70) |
| Component Classification | Dual-Channel Drop-on-Demand (DoD) Thermal Inkjet Replacement Head |
| Ink Color Allocation | Light Magenta (LM) and Light Cyan (LC) |
| Ink Chemistry Pairing | HP Vivera Pigment Inks |
| Manufacturing Standard | Genuine HP Factory Sealed Original (Singapore/Ireland) |
Technical Specifications
| Print Technology | HP Scalable Printing Technology (SPT) / Thermal Inkjet (TIJ 3.0) |
| Total Number of Nozzles | 2,112 nozzles (1,056 nozzles per color channel) |
| Native Channel Resolution | 1200 nozzles per inch (npi) per row pair |
| Maximum Output Resolution | Up to 2400 × 1200 optimized DPI |
| Calibrated Drop Volume | 4 picoliters (pL) native micro-droplet |
| Swath Width per Pass | 21.6 mm (0.85 inches) |
| Smart Chip Integration | Onboard cryptographic EEPROM for ink consumption tracking, firing calibration, and nozzle health mapping |
| Operating Temperature Range | 15°C to 35°C (59°F to 95°F) |
| Storage Temperature Range | 15°C to 35°C (59°F to 95°F) in original sealed foil packaging |
| Operating Humidity Range | 20% to 80% RH non-condensing |
| Physical Dimensions & Weight | 28 × 143 × 132 mm; approx. 0.07 kg (70 g) net |
Key Features & Operational Advantages
- Grain-Free Highlight Tones: Low-density Light Magenta and Light Cyan pigment delivery eliminates visible droplet patterning in skies, portrait flesh tones, and delicate pastel backdrops.
- Precision 4 pL Micro-Drop Firing: Ultra-fine droplet volume ensures tight dot placement accuracy and sharp edge rendering for photographic prints, proofs, and fine-art reproductions.
- Automatic Channel Health Mapping: Works with the printer's optical drop sensor (ODS) to detect misfiring nozzles during print jobs, dynamically substituting adjacent nozzles to prevent banding.
- Drop-In Toolless Replacement: Features an integrated locking latch and color-coded mechanical keying for rapid, error-free installation without requiring technical tools or fluid priming.
CRITICAL TECHNICAL & OPERATIONAL ADVISORY
1. Automated Printhead Alignment: Once seated and latched, the printer prompts an automatic printhead alignment. Ensure genuine photo gloss or heavyweight matte paper is loaded on the platen so the onboard optical sensor can cleanly detect test patterns across both light-density channels.
2. Electrical Contact Pad Integrity: Never touch the gold contact array or the nozzle orifice faceplate with bare fingers. Skin oils and electrostatic discharge can cause communication errors or damaged driver logic. If contaminated, clean the pads gently using a lint-free cloth lightly dampened with distilled water.
3. Service Station Maintenance: Inspect the maintenance station wipers and capping seals. Buildup of dried pigment paste on wiper blades can scrape across the nozzle plate, causing cross-contamination between Light Magenta and Light Cyan chambers or nozzle dropouts.
4. Packaging & Expiration Management: Do not break the foil blister seal until immediately prior to physical installation to prevent dehydration of the factory storage fluid. Check the "Install By" date on the packaging carton to ensure proper fluid wetting and actuator responsiveness.
Compatible Models & Systems
| Printer Series | Ink Chemistry | Supported Platforms |
|---|---|---|
| HP DesignJet Z2100 Series | HP Vivera Pigment | DesignJet Z2100 24-in (Q6675A / Q6677C) & Z2100 44-in (Q6677A / Q6677D) |
| HP DesignJet Z3100 Series | HP Vivera Pigment | DesignJet Z3100 24-in (Q5669A) & Z3100 44-in (Q6659A / Q5670A) Photo Series |
| HP DesignJet Z3200 Series | HP Vivera Pigment | DesignJet Z3200 24-in (Q6718A / Q6718B) & Z3200 44-in (Q6719A / Q6719B) PostScript |
| HP Photosmart Pro Series | HP Vivera Pigment | Photosmart Pro B9180, B8850 (Desktop A3+ Fine Art Printers) |
*Model Differentiation Note: The C9405A printhead is dedicated strictly to the Light Magenta and Light Cyan color pair. It cannot be inserted into carriage slots keyed for other HP 70 pairs (e.g., C9404A Matte Black/Cyan, C9406A Magenta/Yellow, C9407A Photo Black/Light Gray, C9408A Blue/Green, or C9410A Gloss Enhancer/Gray). It is also not compatible with HP 72, HP 73, or HP 771 series printheads.
Terms, Warranty & Customer Protection
Condition: 100% Brand New, Genuine OEM Factory-Original HP Component sealed in official blister pack with factory storage fluid intact.
HP Manufacturer Warranty: Warranted by HP against defects in materials and workmanship until the "Warranty Ends" date printed on the product packaging or until the OEM ink consumption limit is reached, whichever comes first.
Return Policy: Precision electronic consumable. Unopened, factory-sealed boxes are eligible for return under standard commercial terms. Once the outer blister seal is opened, protective orange clip removed, or the head seated in a carriage, returns cannot be accepted due to fluid cross-contamination and activation of the internal smart chip.
C9405A
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