Frequently Asked Questions

• How many pages does the HP 4K0T7LN print?

  HP rates the 4K0T7LN at about 1,000 pages under ISO/IEC 24711 test conditions, printing standard pages at around 5% coverage. Your own count will move with coverage, paper and settings — dense colour pages use far more ink than plain text.

• Which printers take the 4K0T7LN?

  It fits OfficeJet Pro 8125, OfficeJet Pro 8135, OfficeJet Pro 8139. The complete verified list is in the Compatible Printers section on this page — check your model there before ordering.

• What does the 'e' in 923e mean?

  The 923e is HP's EvoMore line — the same fit with more ink and a higher page yield than the standard 923. EvoMore cartridges are sold for the 8100e/9100e e-series generation and, in base (non-e) form, the OfficeJet Pro 8125, OfficeJet Pro 8135 and OfficeJet Pro 8139 covered here.

• Is the 4K0T7LN pigment or dye ink?

  It is pigment ink — the same ink technology HP uses in the original 4K0T7LN — so text stays sharp and resists water and highlighter smear.

• Does this cartridge have a chip?

  Yes — a new compatible chip that reports ink levels to the printer, so the low-ink warnings keep working. It is not a refilled original shell with a reset chip.

• My printer shows a warning after installing — what do I do?

  Acknowledge the on-screen message, reseat the cartridge until it clicks, and restart the printer. If the warning persists, wipe the gold chip contacts with a dry lint-free cloth and reinstall. This family runs HP dynamic security: the printer checks the cartridge chip, and HP firmware updates can change what is accepted. Our cartridges carry a new compatible chip built for these models; if a future HP firmware update ever blocks a cartridge, the lifetime warranty covers you — contact us and we will put it right.

• Will this work if my printer uses HP+?

  if your printer was set up with HP+, it accepts original HP cartridges only — that lock is part of the HP+ program and applies to every non-original cartridge, ours included. On printers that are not HP+-locked, these cartridges install and print as normal.

• Can I mix this cartridge with original HP cartridges?

  Yes. Each slot is read independently, so a compatible black alongside original colours (or the other way round) prints normally.

• Will this fit the OfficeJet Pro 8130e or 9120e series?

  Those e-series variants (the 8100e/9100e generation with HP+) are not covered by this listing — this family page covers the base models named in the Compatible Printers list.

• Is this an original HP cartridge?

  No. It is a Clever Supplies compatible cartridge built to the 4K0T7LN specification and covered by our lifetime warranty. It is not manufactured by HP; the HP name appears only to identify the printers it fits.

• What if the cartridge leaks, is not recognised or prints badly?

  Stop and contact us — do not keep printing on a faulty cartridge. The lifetime warranty covers recognition failures, leaks and print-quality defects: we replace the cartridge or refund you.

• Need the other colours too?

  The full set and the other single colours are linked under the family list on this page, so you can match this cartridge with its matching set.