Description
The Genuine HP 728B 300ml Matte Black DesignJet Ink Cartridge [3WX30A] is a high-capacity Original HP ink cartridge designed for compatible HP DesignJet T730 and T830 series large-format printers and multifunction devices. Containing 300ml of genuine HP pigment-based Matte Black ink, it is engineered to produce crisp technical lines, strong black density and dependable professional output for CAD drawings, architectural plans, maps, diagrams and other large-format documents.
With more than twice the ink capacity of the 130ml HP 728B Matte Black cartridge, the 3WX30A 300ml cartridge is particularly well suited to professional and higher-volume DesignJet users who want to reduce cartridge changes and achieve greater productivity between replacements.
- ✔ Genuine HP Original DesignJet Ink Cartridge
- ✔ HP Cartridge Series: 728B
- ✔ Manufacturer Part Number: 3WX30A
- ✔ Colour: Matte Black
- ✔ High-Capacity 300ml Ink Cartridge
- ✔ Pigment-Based Matte Black Ink
- ✔ HP Thermal Inkjet Technology
- ✔ Designed for HP DesignJet T730 Series
- ✔ Designed for HP DesignJet T830 Series
- ✔ Ideal for CAD, Plans & Technical Drawings
- ✔ Fewer Cartridge Changes for High-Volume Users
- ✔ Genuine HP Fit, Recognition & Reliability
High-Capacity 300ml HP 728B Matte Black Ink
The HP 728B 3WX30A contains 300ml of Genuine HP Matte Black ink for supported HP DesignJet T730 and T830 printers. Its large ink capacity makes it an excellent choice for businesses and professional users with regular or high-volume large-format printing requirements.
Compared with the 130ml HP 728B Matte Black cartridge, the 300ml cartridge contains approximately 2.3 times the ink volume, helping reduce the frequency of cartridge replacement and interruptions during demanding printing workloads.
Key Features
- ✔ Genuine HP Original Ink Cartridge
- ✔ HP 728B DesignJet Ink Series
- ✔ Part Number: 3WX30A
- ✔ Colour: Matte Black
- ✔ High-Capacity 300ml Ink Volume
- ✔ Pigment-Based Matte Black Ink
- ✔ HP Thermal Inkjet Technology
- ✔ Designed for HP DesignJet T730
- ✔ Designed for HP DesignJet T830 Multifunction Printers
- ✔ Sharp Black Lines & Fine Detail
- ✔ Excellent for Technical Drawings & Plans
- ✔ Professional Large-Format Printing
- ✔ Reduced Cartridge Replacement Frequency
- ✔ Reliable OEM Cartridge Recognition
Designed for HP DesignJet T730 & T830
The HP 728B ink system is designed for compatible HP DesignJet large-format printers and multifunction devices. The 3WX30A 300ml Matte Black cartridge is designed for supported HP DesignJet T730 and T830 printer families.
These DesignJet models are widely used by architects, engineers, construction professionals, surveyors and other technical users who require accurate large-format plans, drawings, maps and diagrams.
Compatible HP DesignJet Printers
The Genuine HP 728B 3WX30A Matte Black Ink Cartridge is designed for supported models including:
- ✔ HP DesignJet T730 36-inch Printer
- ✔ HP DesignJet T730 Series
- ✔ HP DesignJet T830 24-inch Multifunction Printer
- ✔ HP DesignJet T830 36-inch Multifunction Printer
- ✔ HP DesignJet T830 Series
Important: Please confirm that your exact DesignJet printer supports HP 728B / 3WX30A before ordering. For older T730 or T830 printers, keeping the printer firmware up to date is recommended for compatibility with later-generation HP 728B cartridges.
Pigment-Based Matte Black Ink
The HP 728B 3WX30A uses pigment-based Matte Black ink. Within the compatible DesignJet T730 and T830 printing system, Matte Black is pigment-based, while the Cyan, Magenta and Yellow inks are dye-based.
Pigment-based Matte Black is particularly suited to technical applications where strong black density, sharp line definition and clearly readable text and annotations are important.
Professional CAD & Technical Printing
The Matte Black cartridge plays an important role in producing fine black lines, dimensions, annotations, text and detailed elements commonly found in technical large-format documents.
The HP 728B 3WX30A is particularly suitable for applications including:
- Architectural Plans
- Engineering Drawings
- CAD Documents
- Construction Plans
- Maps & Diagrams
- Technical Schematics
- Surveying Documents
- Presentations & Business Graphics
300ml Capacity for Higher-Volume Printing
For businesses that use their DesignJet regularly, the 300ml capacity can significantly reduce the number of cartridge changes compared with the 130ml option.
| HP 728B Part Number | Colour | Capacity |
| 3WX26A | Matte Black | 130ml |
| 3WX30A | Matte Black | 300ml |
The 3WX30A contains 170ml more ink than the 130ml 3WX26A, making it particularly attractive for higher-volume environments where reducing consumable changes is important.
Genuine HP Quality & Reliability
Original HP inks are developed together with compatible HP DesignJet printers as part of an integrated printing system. The 3WX30A is designed to provide correct cartridge recognition, consistent ink delivery and dependable professional output.
For businesses relying on their DesignJet for important technical drawings and plans, Genuine HP ink provides the OEM consumable formulation designed specifically for the printing system.
Product Specifications
| Brand | HP |
| Cartridge Series | HP 728B |
| Manufacturer Part Number | 3WX30A |
| Product Type | Genuine DesignJet Ink Cartridge |
| Manufacturer Type | Genuine / Original HP |
| Colour | Matte Black |
| Ink Capacity | 300ml |
| Ink Type | Pigment-Based |
| Print Technology | HP Thermal Inkjet |
| Pack Quantity | 1 Ink Cartridge |
| Compatible Printer Series | HP DesignJet T730 / T830 |
| Condition | New |
HP 728 / 728B DesignJet Ink System
Compatible HP DesignJet T730 and T830 printers use separate Matte Black, Cyan, Magenta and Yellow cartridges. This allows each colour to be replaced independently according to actual ink usage.
The 3WX30A is specifically the high-capacity 300ml HP 728B Matte Black cartridge. Cyan, Magenta and Yellow cartridges have their own individual HP part numbers and capacities.
HP specifies this DesignJet consumable by ink volume rather than a conventional office-printer page yield. Actual ink consumption varies according to drawing size, print coverage, media, print mode and document type.
Ideal For
- ✔ Architects & Architectural Practices
- ✔ Engineers & Engineering Offices
- ✔ Construction & Building Companies
- ✔ Surveyors & Planning Professionals
- ✔ CAD & Technical Drawing Users
- ✔ Government & Educational Organisations
- ✔ High-Volume Large-Format Printing
- ✔ Maps, Plans & Diagrams
- ✔ Technical Line Drawings
- ✔ HP DesignJet T730 Users
- ✔ HP DesignJet T830 Users
- ✔ Customers Requiring Genuine HP DesignJet Ink
Why Choose the 300ml HP 728B Cartridge?
The Genuine HP 728B 3WX30A is particularly attractive for customers who regularly use their DesignJet T730 or T830 and want to minimise cartridge replacement frequency.
With 300ml of pigment-based Matte Black ink, it offers significantly greater capacity than the 130ml 3WX26A while maintaining the Genuine HP formulation designed for crisp technical lines, strong black density and reliable professional output.
What's Included?
- ✔ 1 × Genuine HP 728B 300ml Matte Black DesignJet Ink Cartridge [3WX30A]
Frequently Asked Questions (FAQ)
Is the HP 3WX30A a Genuine HP ink cartridge?
Yes. This listing is for a Genuine Original HP 728B DesignJet Ink Cartridge, not a compatible, generic or refilled cartridge.
Is 3WX30A HP 728 or HP 728B?
The 3WX30A is an HP 728B Matte Black DesignJet ink cartridge.
What colour is HP 3WX30A?
The 3WX30A is Matte Black.
How much ink is in the HP 3WX30A cartridge?
The 3WX30A contains 300ml of Matte Black ink.
Is HP 728B 3WX30A pigment or dye ink?
The Matte Black ink used by the HP 728B 3WX30A is pigment-based. In the compatible T730 and T830 printing system, Cyan, Magenta and Yellow use dye-based ink.
Does 3WX30A work with the HP DesignJet T730?
Yes. The HP 728B 3WX30A 300ml Matte Black cartridge is designed for compatible HP DesignJet T730 printers.
Does 3WX30A work with the HP DesignJet T830?
Yes. The 3WX30A is designed for compatible HP DesignJet T830 multifunction printers.
What is the difference between 3WX26A and 3WX30A?
Both are Genuine HP 728B Matte Black cartridges. The 3WX26A contains 130ml, while the 3WX30A contains 300ml. The 3WX30A therefore provides 170ml more ink and is better suited to higher-volume printing.
Is the 300ml cartridge better value than the 130ml cartridge?
For customers with regular or high-volume Matte Black usage, the 300ml cartridge can be more convenient because it reduces the frequency of cartridge replacement. Actual value will depend on cartridge pricing and individual printing volume.
Can I replace only the Matte Black cartridge?
Yes. Compatible HP DesignJet T730 and T830 printers use separate Matte Black, Cyan, Magenta and Yellow ink cartridges, allowing each colour to be replaced independently.
Does the HP 3WX30A have a page yield?
HP specifies this DesignJet cartridge primarily by its 300ml ink capacity rather than a conventional office-printer page yield. Actual usage depends on drawing size, ink coverage, media, print mode and document type.
Should I order by HP 728B or by the 3WX30A part number?
Always verify the exact manufacturer part number 3WX30A together with the HP 728B series, Matte Black colour and 300ml capacity before ordering.
OEM Code: 3WX30A
Brand: HP
Duty Cycle: 300ml
Includes Of:
1 x Genuine HP #728 130ml Matte Black Ink Cartridge 3WX30ACompatible Printer Models:
HP Designjet T730
HP Designjet T830
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