HP 738B 300ml Black DesignJet Ink Cartridge (498P6A)

The HP 738B Black Ink Cartridge 300ml (498P6A) is a genuine HP high-capacity ink cartridge developed for professional large-format printing. Designed for compatible HP DesignJet printers, this original HP cartridge features advanced HP Flex Tech ink technology to produce bold black text, precise technical lines, clear engineering drawings, and professional-quality graphics.

Commonly identified by suppliers as the HP 738B Matte Black Ink Cartridge (MBK), this 300ml ink cartridge is a practical printing solution for architectural practices, engineering consultancies, construction companies, CAD professionals, educational institutions, and commercial design offices.

The HP 738B cartridge is designed for selected HP DesignJet T850, T870, and T950 large-format printers. Its original HP ink formulation supports consistent black printing on suitable plain and coated printing media.

For businesses that regularly print technical drawings, layouts, maps, construction plans, and other professional documents, the cartridge’s 300ml ink capacity offers a convenient way to manage black ink replacement requirements.

1. Genuine HP 738B Black Ink Cartridge for Professional Printing

The HP 738B Black Ink Cartridge is an original HP printing supply designed for compatible DesignJet printers. Unlike conventional desktop ink cartridges, this product is developed for professional large-format printing applications.

Large-format printers frequently handle documents that contain detailed linework, text, graphics, and complex layouts. The quality of the black ink contributes to the readability and appearance of these printed materials.

HP develops its original cartridges to work with the specified printer hardware, ink delivery systems, and printheads.

The HP 738B cartridge carries the manufacturer part number 498P6A, which identifies the 300ml black model.

Using the exact part number helps customers distinguish the intended cartridge from other HP 738 products.

For businesses that depend on printing equipment for daily operations, selecting the correct genuine ink cartridge supports dependable document production and effective consumables management.

2. High-Capacity 300ml Black Ink Supply

The HP 738B Black Ink Cartridge contains 300ml of ink, making it suitable for professional environments with regular large-format printing requirements.

A higher-capacity cartridge can reduce the frequency of replacements compared with a smaller-capacity cartridge, depending on printing volume and black ink consumption.

For example, an engineering office may produce numerous architectural drawings, infrastructure plans, diagrams, and technical reports during a working week.

These documents frequently contain black lines, text, symbols, and measurement information.

The 300ml cartridge provides a larger ink supply for those applications.

It is particularly relevant for shared printers used by multiple employees or departments.

Actual cartridge life depends on document size, ink coverage, printing settings, paper type, and printer maintenance activity.

HP does not specify a single universal page yield for this cartridge, so customers should evaluate consumption according to their actual large-format printing needs.

3. Advanced HP Flex Tech Ink Technology

The HP 738B Black Ink Cartridge uses HP Flex Tech ink technology, developed for technical and professional DesignJet printing applications.

HP Flex Tech inks are formulated to provide clear line definition, bold black output, and durability when used in suitable printing systems.

These characteristics are particularly useful in documents containing complex line drawings, detailed graphics, annotations, and technical symbols.

HP has developed this ink technology using knowledge from its broader large-format printing portfolio.

The ink is intended to work alongside the supported printer’s printheads, printing controls, and ink delivery system.

This integrated approach contributes to consistent performance during normal printing operations.

Original HP Flex Tech ink is suitable for professional users who need dependable printing rather than general-purpose ink products of uncertain compatibility.

4. Rich Black Output and Clear Text Reproduction

Black ink is essential for creating readable technical documents.

The HP 738B Black Ink Cartridge supplies black ink for compatible HP DesignJet printers, helping reproduce text, detailed linework, diagrams, and dark graphical elements.

Technical documents often include small labels, measurement figures, legends, and annotations.

These details must remain readable so that the information can be interpreted accurately.

Clear black printing also contributes to the appearance of professional reports, presentations, and client documents.

For example, an architectural plan may contain room dimensions, material descriptions, technical notes, and section markers.

The original HP black ink helps support the printer’s intended reproduction of these elements.

Final print quality also depends on printer configuration, printhead condition, paper type, and the resolution of the original document.

5. Pigment-Based Ink for Technical Printing

The HP 738B cartridge uses HP Flex Tech pigment-based ink technology.

Pigment-based inks use fine colour particles suspended in an ink formulation.

This technology is suitable for producing defined text, detailed technical graphics, and durable printed information.

Professional printing applications often require a balance between clear fine lines, appropriate colour density, and output durability.

HP Flex Tech ink is developed to support these needs in compatible DesignJet printing systems.

The ink is particularly relevant to drawings and documents that may be reviewed, handled, stored, or shared between departments.

However, durability depends on the combination of ink, printing media, and environmental conditions.

Customers should choose suitable HP-supported printing media when producing documents for extended storage or demanding applications.

6. Compatible with HP DesignJet T850 Printers

The HP 738B 300ml Black Ink Cartridge is designed for compatible HP DesignJet T850 printers.

Supported devices include the HP DesignJet T850 36-inch Printer and HP DesignJet T850 36-inch Multifunction Printer, subject to regional cartridge requirements.

The T850 printer family is intended for professional large-format output, including construction drawings, CAD documents, architectural plans, and presentation material.

The HP 738B cartridge provides the black ink needed for supported printing tasks.

Its 300ml capacity can be especially useful for T850 users who print regularly.

Printer owners should check their device’s full model number and cartridge requirements before purchasing.

A suitable cartridge must match the supported ink system, not simply the printer manufacturer’s name.

7. Compatible with HP DesignJet T870 Printers

The HP 738B Black Ink Cartridge is also listed for the HP DesignJet T870 24-inch Printer.

This large-format printer is designed for professional technical printing and office environments that require detailed colour and monochrome documents.

The cartridge supplies original HP black ink for compatible printing applications.

Examples include engineering diagrams, technical drawings, construction documentation, architectural layouts, and business presentations.

Its larger 300ml capacity offers a practical option for users who frequently need black ink for these documents.

As with other DesignJet consumables, compatibility must be confirmed using the full model designation and applicable regional specifications.

Customers should also distinguish the HP 738B cartridge from other HP black ink products that may use similar naming conventions.

8. Compatible with HP DesignJet T950 Printers

The HP 738B Black Ink Cartridge supports compatible HP DesignJet T950 printer configurations.

These include the HP DesignJet T950 36-inch Printer and the HP DesignJet T950 36-inch Multifunction Printer.

The T950 family is designed for professional offices that manage large-format printing requirements.

Typical applications include technical documents, project layouts, detailed diagrams, posters, and presentation graphics.

The HP 738B Black Ink Cartridge supplies the black ink required by the printer’s supported ink system.

For companies operating shared DesignJet T950 printers, the 300ml cartridge can help reduce the frequency of replacement compared with lower-capacity versions.

It is suitable for ongoing business printing when the printer supports the 498P6A cartridge.

9. Ideal for Architectural Drawings and Building Plans

Architectural documents require clear text, precise linework, and accurate representation of design elements.

The HP 738B Black Ink Cartridge is suitable for compatible DesignJet printers used by architectural professionals.

Typical documents include floor plans, elevations, building sections, site layouts, structural drawings, and construction details.

Black ink contributes to the appearance of walls, boundaries, annotations, measurements, and other important features.

Architects often need to provide printed documents to clients, contractors, consultants, and project managers.

Readable linework and consistent black text are important for professional communication.

The HP 738B cartridge supports these requirements through its original HP ink formulation.

For best results, users should also select suitable drawing scales, paper sizes, print-quality settings, and document export options.

10. Designed for Engineering and CAD Printing

Engineering professionals frequently work with detailed technical designs that require accurate visual reproduction.

The HP 738B Black Ink Cartridge supports black line printing in compatible HP DesignJet printers used for CAD applications.

Engineering documents may include mechanical designs, electrical schematics, civil engineering layouts, manufacturing diagrams, piping plans, and equipment drawings.

These documents can contain hundreds of lines, dimensions, symbols, and annotations.

Strong black output helps separate important information from the background and improves readability.

The HP Flex Tech ink formulation is designed to support fine-line clarity.

For offices producing technical documents regularly, the cartridge’s 300ml capacity offers a useful printing supply.

Users should maintain appropriate plot settings and check the output scale before printing final engineering drawings.

11. Suitable for Construction and Infrastructure Projects

Construction companies often require printed drawings at different stages of a project.

These may include approved building plans, revised layouts, structural documents, site drawings, and installation instructions.

The HP 738B Black Ink Cartridge is suitable for compatible DesignJet printers used to produce such documents.

Clear black text and linework are especially important when construction teams need to read dimensions, labels, and technical notes.

The cartridge provides a genuine HP ink supply for these professional applications.

For companies that print large quantities of drawings, the high-capacity format can support practical consumables management.

The printer operator should verify the latest document revision, correct paper size, and required drawing scale before printing.

Accurate printing procedures are as important as the ink cartridge when producing documents for professional use.

12. Professional Blueprint and Technical Line Printing

Technical drawings often use combinations of line thickness, shading, text, and symbols.

The HP 738B Black Ink Cartridge contributes to the reproduction of these elements.

A professional drawing may contain fine reference lines alongside thicker structural outlines.

Different line weights help distinguish important features.

The printer’s ability to reproduce those details depends on its printing technology, settings, paper, and ink.

Original HP Flex Tech ink is designed to support clear line output within the compatible DesignJet printing system.

This makes the cartridge relevant to architectural offices, drafting services, and technical printing departments.

For documents requiring precise dimensional interpretation, customers should follow the printer’s recommended settings and confirm the printed scale.

13. Useful for Maps and Survey Drawings

Surveying firms, infrastructure companies, planning departments, and engineering consultancies often produce printed maps.

These documents may contain property boundaries, roads, geographical features, contour lines, labels, and service layouts.

The HP 738B Black Ink Cartridge supports the reproduction of black elements in these documents.

Black printing is important for map legends, measurement information, labels, and symbols.

The cartridge works as part of the supported DesignJet printing system alongside the appropriate colour supplies.

For map printing, users should select suitable media and output settings based on the intended application.

The 300ml black ink capacity is particularly relevant when a department regularly produces large-format drawings or technical maps.

14. Ideal for Professional Office Presentations

Large-format printers are also used for professional presentations and visual communication.

An architectural company may prepare project presentation boards, while an engineering department may print large diagrams for a meeting.

The HP 738B Black Ink Cartridge provides black ink for text, labels, outlines, and graphical details.

Its Flex Tech ink formulation helps support professional printing quality when used with appropriate media.

Clear black text can improve the readability of presentation boards, even when they contain multiple colours.

The cartridge can also support internal notices, visual reports, project charts, and technical posters.

Businesses should select a paper type and printing mode suitable for each presentation.

15. Suitable for Design Studios and Technical Consultancies

Design studios and technical consultancies frequently require high-quality printed output for client projects.

They may produce concept drawings, layout diagrams, presentation boards, technical illustrations, and project documentation.

The HP 738B Black Ink Cartridge is designed for compatible DesignJet printers serving these requirements.

Black ink contributes to the reproduction of text, fine outlines, line drawings, and dark graphical elements.

Its 300ml capacity can be useful when projects require multiple prints or frequent revisions.

Maintaining a suitable supply of original HP ink also helps businesses plan their printing activities.

For professional printing, customers should ensure that the cartridge, paper, document settings, and printer condition are appropriate for the work being produced.

16. HP 738B 300ml Black vs HP 738B 130ml Black

The HP 738B ink cartridge family includes more than one black ink capacity.

The HP 738B 130ml Black DesignJet Ink Cartridge (498P2A) contains 130ml of ink.

The HP 738B 300ml Black DesignJet Ink Cartridge (498P6A) contains 300ml of ink.

The larger version provides approximately 2.31 times the ink volume of the 130ml model.

Both are original HP ink products, but customers must confirm that the selected version is compatible with their printer.

The 130ml cartridge may be suitable for occasional or moderate printing requirements.

The 300ml cartridge is especially useful for users who print technical drawings regularly.

When comparing cost effectiveness, customers should consider the actual selling price, volume of printing, and expected black ink consumption.

The larger cartridge does not guarantee a particular number of printed drawings because document dimensions and ink coverage vary.

17. Understanding HP 738 and HP 738B Black Cartridges

The HP 738 ink family includes different black cartridge variants and capacities.

The HP 738 300ml Black Ink Cartridge (498N8A) and HP 738B 300ml Black Ink Cartridge (498P6A) are distinct manufacturer part numbers.

Customers should not assume that two cartridges are identical simply because both belong to the HP 738 family and contain 300ml of black ink.

The correct selection depends on the printer’s approved consumables and regional specifications.

The 498P6A cartridge is officially designated HP 738B Black.

Some retailers describe this version as Matte Black or MBK.

For an accurate purchase, the manufacturer part number should take priority over abbreviated colour descriptions.

This is particularly important for businesses purchasing cartridges through procurement systems or online product catalogues.

18. Complete HP 738 Ink Colour System

Compatible HP DesignJet printers use multiple ink colours to produce technical drawings and professional colour documents.

The HP 738 and HP 738B cartridge families include black, cyan, magenta, and yellow supplies.

Related 300ml cartridges include:

• HP 738B Black 300ml – 498P6A
• HP 738 Cyan 300ml – 676M6A
• HP 738 Magenta 300ml – 676M7A
• HP 738 Yellow 300ml – 676M8A

The black cartridge supplies black ink, while the colour cartridges contribute to the reproduction of coloured graphics and drawings.

The HP 738B Black cartridge contains black ink only.

It does not include cyan, magenta, or yellow ink.

Customers should confirm each cartridge’s manufacturer code before ordering a complete replacement set.

The availability of particular cartridges may differ by printer model and region.

19. Designed for HP Thermal Inkjet Printing

The HP 738B Black Ink Cartridge works with compatible printers using HP Thermal Inkjet printing technology.

Thermal inkjet printing involves controlled delivery of ink through a printhead system onto the selected media.

The cartridge provides the black ink required for this process.

Print quality depends on several factors, including ink formulation, printhead condition, media, printer settings, and document quality.

Original HP ink is developed for the specified printer system.

The HP 738B cartridge is a consumable ink supply and should not be confused with a printhead replacement kit.

For supported printer families, HP also offers the HP 739 DesignJet Printhead Replacement Kit under part number 498N0A.

A new ink cartridge does not automatically resolve mechanical or printhead-related printer faults.

20. High-Capacity Cartridge for Busy Offices

Professional offices often share a large-format printer among several users.

Architects, engineers, project coordinators, and administrative employees may all require printed documents.

The HP 738B 300ml Black Ink Cartridge can help support these regular printing requirements.

The larger ink volume reduces how frequently users may need to replace the black cartridge compared with a 130ml version, assuming similar printing conditions.

This can be useful in environments where documents are printed throughout the working day.

Businesses can further improve printing efficiency by monitoring ink levels and maintaining spare consumables.

The cartridge’s 498P6A part number makes it easy to identify the product in inventory records.

21. Clear Lines and Detailed Technical Graphics

Precise line reproduction is important in technical printing because printed lines may represent measurements, boundaries, components, or construction features.

The HP 738B Black Ink Cartridge supports the black component of detailed graphics produced by compatible DesignJet printers.

HP Flex Tech technology is designed for clear linework and bold black output.

These qualities are useful when printing technical drawings containing closely spaced details or small annotations.

The final appearance of fine lines also depends on the printer’s native resolution and selected printing mode.

Users should choose suitable output settings for documents that require careful technical review.

For particularly detailed drawings, appropriate paper and a quality-focused print mode may help improve readability.

22. Durable Printing for Professional Documents

Professional documents are frequently handled, reviewed, transported, and stored.

HP Flex Tech inks are designed to provide durable output when used with supported printing media.

HP identifies benefits including water resistance, lightfastness, and resistance to smudging and highlighter bleed under applicable testing conditions.

These characteristics can be valuable for documents used in meetings, offices, and technical work environments.

However, print durability is affected by paper selection, environmental conditions, handling, and exposure.

Customers should not assume that every print is waterproof or archival merely because it uses pigment-based ink.

For important documents, follow HP’s media and printing recommendations.

Proper storage can also help preserve printed information.

23. Efficient Ink Consumption for Large-Format Printing

Large-format printing consumes different amounts of ink depending on the document being printed.

A simple line drawing may use relatively little black ink, while a heavily shaded graphic may require significantly more.

The HP 738B 300ml Black Ink Cartridge provides a substantial ink supply for the supported printing system.

However, it is not possible to assign a reliable universal page yield without specifying the test conditions.

Businesses should monitor actual usage to estimate replacement requirements.

Printing software, printer usage reports, or internal records can help identify consumption patterns.

A department that prints mostly architectural plans may use ink differently from one producing presentation posters.

Understanding these differences helps businesses select suitable cartridge capacities and maintain reasonable consumables stock.

24. Genuine HP Ink for Dependable Performance

Original HP consumables are developed for the printers specified by HP.

Using genuine HP ink can help support reliable printing performance, consistent output, and predictable consumables management.

The HP 738B Black Ink Cartridge is identified by its official manufacturer part number and product family.

For businesses, this identification helps reduce uncertainty when ordering supplies.

Unverified third-party inks may have different formulation characteristics, potentially affecting performance or print quality.

Customers should follow the printer manufacturer’s requirements and warranty conditions.

The correct HP 738B cartridge is particularly important for organizations that depend on their large-format printers for client deliverables and technical documentation.

25. Easy Cartridge Identification and Ordering

The HP 738B 300ml Black Ink Cartridge carries the product code 498P6A.

This number should be included in purchase orders, quotations, inventory sheets, and product catalogues.

Using the exact part number helps distinguish the cartridge from other HP DesignJet ink products.

A purchase description such as “HP 738 black ink” may be insufficient because the series includes multiple variants.

A more precise description is “HP 738B 300ml Black DesignJet Ink Cartridge – 498P6A.”

This includes the manufacturer, model, capacity, colour, product type, and part number.

Such identification is particularly useful for procurement departments managing supplies for several printers.

Customers should also check the label and packaging details when receiving the product.

26. Installation and Cartridge Replacement

The HP 738B Black Ink Cartridge should be installed according to the operating instructions for the compatible HP DesignJet printer.

Before replacement, check the printer’s cartridge status and confirm that the black ink supply requires attention.

Access the cartridge compartment according to the printer’s instructions.

Carefully remove the depleted cartridge and prepare the new original HP replacement.

Avoid touching electrical contacts or other sensitive parts.

Install the cartridge in the appropriate position without applying excessive force.

After installation, follow any instructions displayed by the printer.

The device may perform an automatic initialization or cartridge verification process.

If an unexpected cartridge error appears, confirm the manufacturer part number and printer compatibility before further troubleshooting.

27. Proper Cartridge Storage and Handling

Correct storage is important for unused ink cartridges.

The HP 738B Black Ink Cartridge should remain in its original packaging until it is required.

Store it in a suitable indoor location protected from physical damage and extreme environmental conditions.

Avoid opening the cartridge before installation.

When handling ink cartridges, follow the instructions printed on the product packaging.

Do not attempt to modify, refill, or dismantle the original cartridge.

Ink cartridges should be kept away from environments where accidental leakage could damage equipment or stored documents.

For businesses maintaining multiple cartridges, use a clearly organized stock system.

Recording part numbers, ink colours, and receipt dates can help ensure that the correct consumables are issued when needed.

28. Responsible Printing and Recycling

Responsible printing practices can help organizations manage paper consumption and used cartridges.

Businesses can reduce unnecessary print jobs by checking documents before production.

Reviewing drawing scales, page sizes, revisions, and print-quality settings can prevent avoidable reprints.

HP also provides information about recycling programs for original ink and toner supplies.

The availability of specific collection and recycling options varies by country and region.

Used cartridges should be handled according to applicable local waste requirements.

The larger 300ml capacity may reduce cartridge replacement frequency compared with a smaller version for the same amount of ink usage.

However, actual environmental impact depends on manufacturing, usage, recycling, and disposal practices.

29. Suitable for Bulk Procurement and Corporate Requirements

Large organizations often need a reliable process for purchasing printing consumables.

The HP 738B 300ml Black Ink Cartridge is suitable for inclusion in corporate procurement records where compatible DesignJet equipment is used.

Its official product identification makes it straightforward to specify on purchase documents.

Procurement teams can record the HP 738B series, black colour, 300ml capacity, and 498P6A part number.

For businesses with multiple printing departments, printer-wise consumables lists help prevent ordering errors.

Maintaining a reasonable replacement stock can also reduce delays when cartridges run low.

Before purchasing large quantities, businesses should verify that the cartridge is suitable for every intended printer.

This is especially important when devices were purchased from different regional markets.

30. Why Choose HP 738B 300ml Black Ink Cartridge?

The HP 738B 300ml Black Ink Cartridge offers an appropriate printing supply for professionals who use compatible HP DesignJet printers.

Its main benefits include:

• Genuine HP original ink cartridge
• 300ml high-capacity black ink supply
• HP Flex Tech pigment-based ink technology
• Bold black output and precise fine-line reproduction
• Suitable for architectural and engineering documents
• Support for professional CAD and technical printing
• Compatibility with selected HP DesignJet T850, T870, and T950 printers
• Suitable for maps, construction drawings, posters, and presentation documents
• Convenient product identification through part number 498P6A
• Original HP warranty coverage subject to the applicable terms

For businesses that regularly produce technical documents, these features make the cartridge a practical choice.

31. Buy HP 738B 300ml Black DesignJet Ink Cartridge

The HP 738B Black Ink Cartridge 300ml (498P6A) is a genuine high-capacity HP ink solution for compatible professional DesignJet printers.

Developed with HP Flex Tech pigment-based ink technology, this original cartridge supports precise linework, bold black text, and professional technical document printing.

Its 300ml capacity makes it suitable for architectural firms, engineering companies, construction businesses, educational institutions, and commercial printing departments.

Whether you require black ink for CAD drawings, maps, layouts, plans, or professional presentations, the HP 738B cartridge provides a manufacturer-specified solution for compatible equipment.

Before purchasing, confirm that your printer supports HP 738B part number 498P6A.

For genuine HP ink cartridges, business quotations, and printing consumables, contact Aadinath Peripherals & Consumables, Mumbai.

HP 738B 300ml Black DesignJet Ink Cartridge – Genuine HP quality, professional line precision, and dependable large-format printing.