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Original HP 70 Photo Black and Light Gray Printhead (C9407A)
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Factory dual-color thermal inkjet printhead delivering 4 pL droplets for Photo Black and Light Gray in HP DesignJet photo printers.
OEM Replacement Component
Original HP 70 Photo Black and Light Gray Printhead (C9407A)
OEM Part Number: C9407A (HP No. 70) | Dual-Color Thermal Inkjet (TIJ 3.0) Replacement Printhead
Product Overview
The Original HP 70 Photo Black and Light Gray Printhead (C9407A) is an authentic original equipment manufacturer dual-color thermal inkjet (TIJ) printhead component engineered specifically for HP DesignJet large-format photo, proofing, and fine art printers. Serving as the primary monochromatic grayscale foundation across HP’s 6-color, 8-color, and 12-color Vivera pigment ink systems, the C9407A printhead manages dense Photo Black (PK) for glossy non-porous media and ultra-dilute Light Gray (LG) for fine photographic highlight transitions, neutral shadows, and grain-free continuous-tone monochromes.
Housing 2,112 active nozzles (1,056 nozzles dedicated per channel across dual interleaved arrays), the HP 70 C9407A 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 Photo Black and Light Gray Printhead |
| OEM Manufacturer | HP Inc. (Hewlett-Packard) |
| OEM Part Number | C9407A (HP 70) |
| Component Classification | Dual-Channel Drop-on-Demand (DoD) Thermal Inkjet Replacement Head |
| Ink Color Allocation | Photo Black (PK) and Light Gray (LG) |
| 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
- Exhibition Grayscale Depth: Paired with standard Gray and Matte Black channels, this head creates a multi-tier black-and-white ink set that eliminates color casts and metamerism across varying display lighting conditions.
- Grain-Free Highlight Transitions: The Light Gray channel deposits ultra-dilute pigment particles across pale tonal areas, preventing dot visibility and stippling in skies, delicate architectural stonework, and bright specular highlights.
- 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.
- Active Optical Drop Detection: Works with the printer's optical drop sensor (ODS) to detect misfiring nozzles during print jobs, dynamically substituting adjacent nozzles to prevent horizontal banding.
CRITICAL TECHNICAL & OPERATIONAL ADVISORY
1. Automated Printhead Alignment: Once seated and latched, allow the printer to complete its automated printhead alignment sequence. Ensure white photo glossy or heavyweight matte paper is loaded on the platen so the onboard optical sensor can clearly read the calibration patterns for both Photo Black and Light Gray 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 Photo Black and Light Gray 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 DesignJet Z5200 / Z5400 | HP Vivera Pigment | DesignJet Z5200 PostScript & Z5400 PostScript Production Printers |
| HP Photosmart Pro Series | HP Vivera Pigment | Photosmart Pro B9180, B8850 (Desktop A3+ Fine Art Printers) |
*Model Differentiation Note: The C9407A printhead is dedicated strictly to the Photo Black and Light Gray color pair. It cannot be inserted into carriage slots keyed for other HP 70 pairs (e.g., C9404A Matte Black/Cyan, C9405A Light Magenta/Light Cyan, C9406A Magenta/Yellow, C9408A Blue/Green, C9409A Matte Black/Red, 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.
C9407A
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