Cartridge WECARE ARMOR compatible with HP DJ 3940 black

The WECARE ARMOR cartridge compatible with HP DJ 3940 is a black ink replacement designed for use in HP All-in-One models including Deskjet Portable, 310, 320, 340 and DeskWriter 310, 320. It contains approximately 21 ml of pigment-based ink formulated to deliver sharp, laser-quality text and precise images while reducing maintenance needs and support calls. The cartridge is suitable for general home and office printing and for document storage due to its fade-resistant properties.

Advantages

The cartridge uses pigment-based ink to produce high-resolution, fade-resistant text and images. It is designed for easy installation and refill tool compatibility, helps lower maintenance costs, and aims to maintain consistent print quality and productivity comparable to genuine replacements.

Suitable for

• Home printing of documents and labels
• Office documents requiring sharp black text
• Archival or long-term document storage
• All-in-One HP Deskjet and DeskWriter models listed (Portable, 310, 320, 340)

Key specifications

• Compatibility: HP Deskjet Portable, 310, 320, 340; HP DeskWriter 310, 320
• Colour: Black
• Volume: approx. 21 ml
• Ink type: Pigment-based, fade resistant
• Manufacturer brand: ARMOR (WECARE compatible)
• MPN: K20232W4
• EAN: 8715057012167

How to use

Turn the printer off, open the cartridge access panel, remove the empty cartridge according to the printer manufacturer's instructions and insert the WECARE ARMOR replacement until it clicks into place. Close the access panel, power the printer on, and run a test print or alignment if prompted. Use the printer's maintenance or cleaning cycle if necessary to ensure optimal print quality.

Usage recommendations

Store cartridges upright in a cool, dry place and install promptly after opening. For best results, use original printer cleaning cycles and avoid mixing different brands in the same printer.