HP 738 300ml Cyan DesignJet Ink Cartridge (676M6A)

The HP 738 Cyan Ink Cartridge 300ml (676M6A) is a genuine, high-capacity printing consumable developed for compatible HP DesignJet large-format printers. Featuring advanced HP Flex Tech pigment-based ink technology, this original cyan cartridge is designed to produce accurate colour output, precise fine-line details, and professional-quality printed documents.

Built for demanding technical and commercial printing environments, the HP 738 300ml Cyan DesignJet Ink Cartridge supports the production of architectural drawings, engineering plans, construction layouts, maps, CAD designs, presentations, diagrams, and large-format posters.

Its 300 ml ink capacity makes it particularly suitable for businesses and professional users who require consistent large-format printing and want to manage cartridge replacement frequency more efficiently.

The cartridge is designed for selected HP DesignJet T850, T870, and T950 printer models. Its original HP formulation works with the printer’s supported ink delivery and printhead system to provide dependable cyan output.

Whether you operate an architectural design studio, engineering office, educational institution, printing department, or construction consultancy, the HP 738 Cyan Ink Cartridge provides a professional ink solution for compatible HP DesignJet equipment.

1. Genuine HP 738 Cyan Ink Cartridge for Professional Printing

The HP 738 Cyan Ink Cartridge is an original HP printing supply specifically designed for compatible DesignJet large-format printing systems.

Unlike ordinary desktop inkjet cartridges, this product is intended for printers capable of producing technical drawings and graphics on larger printing media.

Original HP inks are developed together with supported printer technology to maintain consistent ink delivery, accurate colour reproduction, and reliable operation.

The HP 738 cartridge uses a cyan pigment-based ink formulation that contributes to the production of blue, green, and other mixed colours in printed designs.

Using the correct original cartridge helps maintain the printing system’s intended output quality.

The manufacturer’s part number, 676M6A, provides a reliable reference for identifying the exact product.

For professionals who depend on large-format printers for daily business operations, selecting a correctly specified ink cartridge is an important part of maintaining productivity and reducing unnecessary printing interruptions.

2. High-Capacity 300ml Ink Cartridge

The HP 738 Cyan Ink Cartridge features a 300 ml ink capacity designed for professional printing requirements.

This larger capacity is particularly useful in environments where technical drawings and colour documents are printed regularly.

Compared with the corresponding 130 ml HP 738 Cyan Ink Cartridge, the 300 ml version contains substantially more ink.

A higher ink capacity can reduce the frequency of cartridge replacements, depending on the amount of cyan ink used in printed documents.

For example, architectural offices producing construction drawings and engineering departments printing large-format plans may require frequent colour output.

The 300 ml cartridge allows these organizations to maintain a larger supply of cyan ink inside the printer.

Actual cartridge life depends on document dimensions, colour coverage, media, print-quality settings, and printer maintenance.

Because large-format printing requirements vary significantly, ink consumption should be assessed according to actual workplace usage rather than a fixed A4 page count.

3. Advanced HP Flex Tech Ink Technology

The HP 738 Cyan DesignJet Ink Cartridge uses HP Flex Tech ink technology.

This ink system is developed for professional DesignJet printing applications requiring accurate colour reproduction and clear technical details.

HP Flex Tech pigment-based inks help create vivid colours while supporting the reproduction of fine lines, graphics, and detailed illustrations.

These characteristics are particularly valuable when documents contain a mixture of linework, coloured shapes, text, and technical symbols.

For example, a construction layout may require blue markings, coloured zones, fine measurement lines, and detailed annotations.

The ink must contribute to clear output across these elements.

HP Flex Tech ink works as part of the printer’s supported printing system, alongside appropriate printheads, media, and printing settings.

Using original ink developed for the printer helps maintain consistent performance during ordinary business use.

4. Professional Cyan Colour Reproduction

Cyan is one of the essential colours used in four-colour printing systems.

Alongside magenta, yellow, and black, cyan ink helps produce a wide range of printed colours.

The HP 738 300ml Cyan Ink Cartridge provides the cyan component needed by compatible HP DesignJet printing systems.

It contributes to the reproduction of blue tones, green shades, colour illustrations, graphics, and visual information.

Accurate colour separation is particularly useful in technical printing, where different colours may represent specific categories or design elements.

For instance, a drawing might use cyan or blue lines for service routes, particular structural details, or highlighted design information.

In maps, cyan may contribute to waterways, legends, and other visual features.

The finished appearance of each printed colour depends on the printer’s colour management, other installed inks, paper selection, and print settings.

The HP 738 cartridge is designed to support these requirements as part of a complete professional printing system.

5. Ideal for Architectural Drawings

Architectural firms regularly produce technical drawings that require precision, consistency, and readability.

These documents may include floor plans, site plans, building elevations, sectional drawings, and design presentations.

The HP 738 Cyan Ink Cartridge is suitable for compatible HP DesignJet printers used to produce such materials.

Its pigment-based formulation supports the printing of detailed lines and colour graphics.

In architectural documents, colours may distinguish walls, dimensions, service areas, design elements, or annotations.

Reliable colour reproduction helps ensure that printed information remains visually organized.

A professional ink system is also important when drawings need to be reviewed by clients, consultants, contractors, or project teams.

The 300 ml cyan cartridge is a practical option for architectural workplaces that frequently produce large-format documents.

For consistent results, users should select suitable HP-supported printing media and configure their printer according to the document’s requirements.

6. Suitable for Engineering CAD Printing

Engineering drawings frequently contain detailed technical information that must remain readable after printing.

Examples include mechanical layouts, electrical schematics, piping diagrams, civil engineering plans, and industrial designs.

The HP 738 Cyan DesignJet Ink Cartridge supports cyan colour output in compatible DesignJet printers used for these applications.

Precise colour reproduction can help distinguish different engineering elements within complex layouts.

For example, separate line colours may identify different systems, components, or stages of a design.

The cartridge contributes to producing these colour details while the printer’s overall print mechanism controls the placement and precision of printed lines.

HP Flex Tech inks are developed for applications requiring professional line quality and reliable colour output.

For engineering organizations that regularly print CAD documents, the higher-capacity 300 ml cartridge can support more convenient consumables management.

7. Excellent for Construction and Blueprint Printing

Construction professionals often work with printed plans throughout the project lifecycle.

Typical documents include structural drawings, layout plans, building services diagrams, installation instructions, and construction revisions.

The HP 738 Cyan Ink Cartridge is designed for compatible large-format printers used to produce these materials.

Colour printing can improve communication between architects, engineers, contractors, and site supervisors.

Different colours may identify revised areas, service routes, or construction phases.

Cyan ink contributes to reproducing these elements.

For businesses producing large-format construction documents frequently, the 300 ml cartridge provides a substantial cyan ink supply.

Reliable printing is especially valuable when urgent drawings must be issued for meetings or site activities.

The correct cartridge, suitable paper, and properly maintained printer work together to help produce readable, professional documentation.

8. Compatible with HP DesignJet T850 Printers

The HP 738 Cyan Ink Cartridge 300ml is compatible with supported HP DesignJet T850 36-inch printer models.

The HP DesignJet T850 family is developed for professional large-format printing, including technical documents, construction plans, and drawings.

Relevant models include the HP DesignJet T850 36-inch Printer and HP DesignJet T850 36-inch Multifunction Printer.

The multifunction version combines large-format printing with additional document-handling capabilities.

The 300 ml cyan cartridge supplies ink for the compatible printing system.

This is useful when organizations depend on their DesignJet printer to produce documents throughout the working day.

The exact supported consumables should be verified using the printer’s full model number.

Some devices are available with region-specific configurations, so customers should check the manufacturer’s ink compatibility information before ordering.

9. Compatible with HP DesignJet T950 Printers

The HP 738 300ml Cyan DesignJet Ink Cartridge also supports compatible HP DesignJet T950 36-inch printers.

The T950 family is intended for organizations requiring professional large-format printing and efficient document handling.

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

These printers are used in environments where technical documents, architectural drawings, and graphics must be produced regularly.

The 300 ml cyan cartridge is designed to provide the cyan ink needed for these printing tasks.

For businesses using a shared DesignJet T950 printer, maintaining replacement ink supplies can help avoid interruptions when a cartridge reaches a low ink level.

The manufacturer part number 676M6A should be included in purchase orders and consumables records.

This helps ensure that the intended genuine HP cartridge is supplied.

10. Compatible with Selected HP DesignJet T870 Printers

The HP 738 300ml Cyan Ink Cartridge is also listed for selected HP DesignJet T870 24-inch printer models.

The DesignJet T870 is designed for professional technical and large-format document printing.

In this environment, cyan ink contributes to the creation of drawings, presentations, maps, and colour graphics.

The larger 300 ml cartridge can be useful for users with recurring printing requirements.

When purchasing supplies for an HP DesignJet T870, customers should check the complete printer model and regional specifications.

The HP 738 ink family includes different capacities and colours, so the correct individual item must be selected.

The 676M6A cartridge is the 300 ml cyan version.

It should not be confused with the corresponding magenta, yellow, or black cartridges.

11. Fine-Line Precision for Technical Documents

Fine-line accuracy is an important requirement in professional technical printing.

Architectural and engineering documents often include small symbols, measurement indicators, detailed linework, and closely spaced drawing elements.

The HP 738 Cyan Ink Cartridge supports the printer’s ability to reproduce cyan components of these documents.

HP Flex Tech ink is designed for clear line detail and consistent colour performance.

The precise appearance of printed lines also depends on the printer’s resolution, printhead condition, media, and selected print mode.

Users should choose settings that meet the technical requirements of their documents.

For example, a detailed engineering drawing may benefit from a quality-focused print mode, while internal draft printing may prioritize speed.

Using the original HP cartridge helps maintain the ink characteristics specified for the printer.

12. Suitable for Maps and GIS Printing

Maps and geographic information system documents often include multiple colours, symbols, labels, and detailed graphical elements.

Cyan ink plays an important role in reproducing waterways, boundaries, geographical features, and other coloured areas.

The HP 738 Cyan Ink Cartridge is suitable for compatible DesignJet printers used in map production.

Such printing applications may be relevant to engineering consultancies, surveyors, planning departments, infrastructure companies, and educational organizations.

Large-format printed maps can be valuable when teams need to review detailed information together.

Accurate colour differentiation helps improve readability and communication.

The final appearance of printed maps depends on their source files, software settings, media, and printer configuration.

The 300 ml cartridge is worth considering for workplaces that regularly produce colour maps or technical diagrams.

13. Professional Poster and Presentation Printing

The HP 738 Cyan Ink Cartridge is not limited to engineering and architectural printing.

Compatible HP DesignJet printers can also produce large-format presentations, posters, diagrams, and business graphics.

Cyan ink contributes to blue and green tones, coloured headings, illustrations, and background elements.

This makes the cartridge useful for organizations preparing internal posters, exhibition graphics, presentation boards, and visual reports.

For example, a design consultancy may print a project presentation containing diagrams, renderings, and colour-coded information.

The cyan cartridge provides one of the essential ink colours needed for this output.

Different printing media can produce different results, so users should select paper and print settings based on the intended presentation.

The HP 738 300ml Cyan Ink Cartridge supports professional printing applications when used with its compatible DesignJet printing system.

14. Pigment-Based Ink for Durable Output

The HP 738 Cyan Ink Cartridge uses a pigment-based colour ink formulation.

Pigment-based inks are valued in professional printing applications for their ability to support durable output and clear printed detail.

HP Flex Tech inks are designed for technical drawings and graphics that may need to be stored, reviewed, or referenced after printing.

HP provides print-permanence information for supported combinations of ink, printer, and paper.

Actual durability depends on the printing medium, environmental conditions, light exposure, handling, and storage.

For archival documents, customers should follow HP’s recommendations regarding compatible media and print settings.

A pigment-based ink cartridge alone does not guarantee identical durability on every paper.

For professional users, selecting the correct ink and media combination is an important part of preserving the appearance of printed technical documents.

15. High-Capacity Ink for Busy Printing Departments

Businesses operating large-format printers frequently need to manage ongoing consumables requirements.

The HP 738 Cyan Ink Cartridge has a 300 ml capacity, making it suitable for environments with regular printing activity.

A printing department may serve architects, engineers, project managers, administrative teams, and marketing staff.

Each department may require different printed documents and consume different quantities of cyan ink.

Using the higher-capacity cartridge can reduce the number of replacements required over a given printing volume compared with the corresponding 130 ml version.

This can be beneficial when a printer is used throughout the day.

However, actual replacement frequency depends on the amount of cyan ink consumed.

Businesses should monitor their printer usage and maintain suitable replacement stock rather than assuming that every cartridge will produce a fixed number of drawings.

16. HP 738 300ml Cyan vs HP 738 130ml Cyan

HP offers different capacity options within the HP 738 DesignJet ink family.

The HP 738 130ml Cyan DesignJet Ink Cartridge (498N5A) contains 130 ml of ink.

The HP 738 300ml Cyan DesignJet Ink Cartridge (676M6A) contains 300 ml of ink.

The 300 ml version provides approximately 2.31 times the ink volume of the 130 ml version.

Both options belong to the HP 738 Cyan DesignJet cartridge family, but customers should verify compatibility with their specific printer.

The larger capacity may offer practical advantages for offices with higher printing requirements.

The smaller capacity may be sufficient for users who produce fewer colour documents.

When comparing value, customers should consider the cartridge price, expected printing volume, ink consumption, and replacement frequency.

Because large-format printing varies significantly by document size and coverage, direct page-yield comparisons are not always meaningful.

17. HP 738 Colour Cartridge Range

The HP 738 cartridge family includes multiple colours used in compatible DesignJet printers.

Related high-capacity supplies include:

• HP 738 300ml Cyan Ink Cartridge – 676M6A
• HP 738 300ml Magenta Ink Cartridge – 676M7A
• HP 738 300ml Yellow Ink Cartridge – 676M8A
• HP 738 300ml Black Ink Cartridge – 498N8A
• HP 738B 300ml Black Ink Cartridge – 498P6A

Supported black cartridge variants depend on the printer’s configuration and regional consumables requirements.

Cyan, magenta, yellow, and black ink work together to reproduce different colours in the printer’s colour system.

The HP 738 Cyan cartridge contains cyan ink only.

It does not replace any other colour cartridge or the printer’s printhead.

Customers purchasing multiple consumables should check each product’s exact part number before ordering.

18. Designed to Work with Original HP Printheads

The HP 738 Cyan Ink Cartridge is designed for use within compatible HP DesignJet printing systems.

These printers use dedicated printhead technology to deliver ink onto the selected printing media.

HP original ink cartridges and compatible printheads are engineered as part of a coordinated printing system.

The correct ink formulation supports the intended printing performance and helps maintain reliable operation.

A cartridge supplies ink, while the printhead performs the ink delivery functions required for printing.

These are different components and should not be confused.

If a printer develops a printhead-related error, replacing the cyan cartridge alone may not resolve the issue.

Users should follow the manufacturer’s troubleshooting instructions.

For regular operation, selecting genuine HP consumables and performing recommended maintenance can help support the life and performance of the printing equipment.

19. Consistent Print Quality Across Applications

Large-format printing requirements can vary significantly between projects.

Some users primarily print technical line drawings, while others regularly produce graphics, presentations, maps, or posters.

The HP 738 Cyan Ink Cartridge is intended to support these applications in compatible DesignJet printers.

Its original HP Flex Tech formulation contributes to consistent colour output across a variety of document types.

For a professional printing environment, consistency matters because multiple copies of a drawing or presentation may need to display similar colours.

Print results depend on the printer’s calibration, selected paper, document settings, and other installed cartridges.

Users should maintain suitable printing conditions and use recommended media when colour accuracy is important.

A properly configured printer with the correct original ink can support dependable output across routine professional projects.

20. Efficient Consumables Management for Businesses

Printer consumables are recurring purchases for architectural firms, engineering organizations, and commercial printing departments.

The HP 738 Cyan Ink Cartridge is clearly identified by manufacturer part number 676M6A.

This number can be used in stock registers, purchase orders, supplier quotations, and procurement software.

Using the exact part number is especially important when businesses operate different HP DesignJet printers.

Several printer models may appear similar but use different cartridges.

A centralized consumables list can help businesses purchase the correct products for each printer.

For example, a company may record the printer model, ink colour, cartridge capacity, manufacturer part number, and preferred stock quantity.

The HP 738 300ml Cyan cartridge can then be reordered using this information.

This approach helps reduce the risk of incorrectly ordered consumables and unnecessary printer downtime.

21. Suitable for Professional Design Studios

Design studios often print large-format documents for client presentations, internal reviews, and project development.

These documents may include product concepts, architectural visualizations, technical layouts, presentation graphics, and colour illustrations.

The HP 738 Cyan Ink Cartridge supports the cyan colour component of such prints.

Its pigment-based HP Flex Tech ink formulation is developed for professional output in compatible DesignJet printers.

The 300 ml capacity is useful for studios that regularly produce colour-heavy documents.

When printing presentation materials, paper selection and colour-management settings can significantly influence the finished appearance.

Users should match the printing medium and quality settings to the intended result.

The HP 738 original cartridge helps provide the ink supply specified by the manufacturer for supported printing systems.

22. Important Role in Infrastructure and Surveying

Infrastructure companies, civil engineering consultancies, and surveying departments often produce large-format drawings.

Documents may include road alignments, site boundaries, drainage layouts, utility plans, geographic maps, and project reports.

These materials can contain extensive technical detail and multiple colours.

Cyan ink contributes to the reproduction of blue lines and other colour elements used in such documents.

The HP 738 Cyan Ink Cartridge is designed for selected HP DesignJet printers that can support these professional printing requirements.

The 300 ml capacity may be particularly useful for organizations handling recurring large-format print jobs.

For project documentation, maintaining clear printed information is essential.

Printer operators should verify the drawing scale, paper size, colour settings, and final output before issuing documents for professional use.

23. Original HP Cartridge Identification

Before purchasing the HP 738 Cyan Ink Cartridge, customers should confirm that the product matches their printer’s requirements.

The correct 300 ml cyan model carries manufacturer part number 676M6A.

Customers should distinguish this item from other HP 738 variants.

For example, 676M7A is the 300 ml magenta cartridge and 676M8A is the 300 ml yellow cartridge.

Although these products belong to the same family, they cannot be substituted for one another.

Likewise, cartridges from unrelated HP DesignJet ink families should not be treated as compatible simply because their colours or capacities appear similar.

For corporate procurement, including the manufacturer part number in purchase documents helps improve accuracy.

Customers should also inspect the supplied packaging and product label for the correct identification.

24. Cartridge Installation and Replacement

Installing the HP 738 300ml Cyan Ink Cartridge should be performed according to the instructions for the compatible DesignJet printer.

Before replacement, check the printer’s ink status and confirm that cyan is the cartridge requiring attention.

Access the ink cartridge compartment using the printer’s recommended procedure.

Remove the existing cartridge carefully and prepare the new original HP 738 cyan cartridge.

Avoid touching electrical contacts or other sensitive components.

Insert the replacement cartridge into the correct position without applying excessive force.

Follow any instructions shown on the printer’s display.

The printer may perform an initialization or status-check process after installation.

Do not attempt to install the cartridge into an incompatible slot or printer.

If an error message appears, confirm the product code and consult HP’s support documentation for the specific DesignJet model.

25. Maintaining Your HP DesignJet Printer

Good printer maintenance helps maintain consistent printing performance.

Users should follow HP’s recommended maintenance procedures and monitor cartridge status through the printer interface.

Large-format printers may have particular requirements for printheads, calibration, paper handling, and ink system maintenance.

If printed output contains missing colours, unusual banding, or inconsistent line quality, users should investigate the cause using the printer’s diagnostic tools.

A depleted cyan cartridge is one possible cause of missing cyan output, but print quality may also be affected by printhead condition, printing media, or printer settings.

Printhead cleaning and other maintenance operations should be performed according to HP’s instructions.

Using the correct original HP cartridge is one part of maintaining the printing system.

Regular inspection and appropriate maintenance help support dependable document printing.

26. Sustainability and Responsible Cartridge Disposal

HP Flex Tech ink technology is also associated with environmental considerations.

HP identifies UL ECOLOGO certification for the applicable Flex Tech ink system, reflecting assessment against specified environmental criteria.

However, certification does not mean that the ink can be disposed of without following environmental requirements.

Used cartridges should be handled responsibly.

HP provides information about its Planet Partners recycling initiatives, although program availability depends on the location and product category.

Businesses using large-format printers can also reduce unnecessary printing by checking documents before production and selecting appropriate print settings.

Higher-capacity cartridges may reduce the frequency of cartridge replacement for a given amount of ink consumption.

For organizations working toward more structured consumables management, responsible purchasing, storage, and disposal practices are useful components of everyday operations.

27. Safe Storage and Handling

Printer ink cartridges should be stored and handled according to the manufacturer’s instructions.

Keep unused cartridges in their original packaging until they are required.

Store them in a suitable indoor environment away from physical damage and unsuitable temperature conditions.

Avoid opening cartridge packaging unnecessarily.

During installation, minimize direct contact with liquid ink and take care not to contaminate the cartridge or printer components.

HP publishes specific safety information for the HP 738 ink formulation, including warnings concerning certain chemical components.

Users should read and follow the safety instructions printed on the product label.

Avoid releasing liquid ink into drains, soil, or natural waterways.

Businesses handling large quantities of cartridges should establish suitable storage and disposal procedures.

If accidental exposure or spillage occurs, consult the relevant product safety information and follow the recommended handling procedures.

28. Why Choose the HP 738 300ml Cyan Ink Cartridge?

The HP 738 300ml Cyan DesignJet Ink Cartridge is a practical choice for professional users who require a genuine HP cyan replacement cartridge.

Its primary features include:

• Original HP DesignJet cartridge
• High-capacity 300 ml ink supply
• HP Flex Tech pigment-based technology
• Vivid cyan colour reproduction
• Support for technical drawings and fine-line details
• Compatibility with selected HP DesignJet T850, T870, and T950 printers
• Suitability for architectural and engineering applications
• Professional-quality graphics and presentation output
• Manufacturer part number 676M6A
• Original HP warranty coverage subject to applicable terms

For businesses that rely on large-format printing, the correct cartridge is an important part of maintaining consistent output.

The 300 ml capacity is especially useful when printing requirements are frequent or demanding.

29. Buy HP 738 300ml Cyan DesignJet Ink Cartridge

Choose the HP 738 300ml Cyan DesignJet Ink Cartridge (676M6A) for compatible HP DesignJet printers when you require an original, high-capacity cyan ink supply.

This cartridge is developed for professional technical printing and supports applications including CAD drawings, maps, construction plans, architectural layouts, presentations, and posters.

Its HP Flex Tech pigment-based ink formulation helps produce vivid colours and detailed printed output.

The 300 ml ink capacity makes the product suitable for workplaces with recurring large-format printing requirements.

Before ordering, check the full printer model and confirm compatibility with HP 738 cartridge part number 676M6A.

For manufacturer specifications, visit the official HP 738 300ml Cyan DesignJet Ink Cartridge product page.

For product enquiries, business quotations, and printing consumables requirements in India, visit Aadinath Peripherals & Consumables.

HP 738 Cyan Ink Cartridge 300ml – Original HP Flex Tech ink for precise, durable, and professional large-format printing.