The HP 21 Black Inkjet Print Cartridge combines patented ink formulations with advanced inkjet print cartridge technology to ensure crisp, laser-quality black text every time you print.

Pigmented black inks provide crisp sharp text for your letters and reports-documents you can be proud of from your HP printer.

Keep your documents for a long-term reference.

Printed text from this HP ink remains dark and sharp longer.

Results you can count on across a broad range of plain papers and speciality media.

Print greeting cards, homework assignments, letters, e-mail, and reports with confidence.

HP quality and reliability ensures your prints are genuine HP quality.

HP inkjet printing supplies and printers are designed to produce consistently great results every time.

A precision-engineered and tested system of supplies and printers designed together to work together.

• The HP 21 Black Inkjet Print Cartridge combines patented ink formulations with advanced inkjet print cartridge technology to ensure crisp, laser-quality black text every time you print
• Pigmented black inks provide crisp sharp text for your letters and reports-documents you can be proud of from your HP printer. Keep your documents for a long-term reference. Printed text from this HP ink remains dark and sharp longer
• Results you can count on across a broad range of plain papers and speciality media. Print greeting cards, homework assignments, letters, e-mail, and reports with confidence. HP quality and reliability ensures your prints are genuine HP quality
• HP inkjet printing supplies and printers are designed to produce consistently great results every time. A precision-engineered and tested system of supplies and printers designed together to work together