If your printer says low ink and will not print in black, the black cartridge or its nozzles are likely empty, clogged, or dried out, or a color cartridge is empty on a printer that mixes colors to make black. Many inkjets also refuse to print at all until every low cartridge is replaced. Run a printhead cleaning and replace any empty cartridge to restore black printing.
Why this happens
- Black cartridge is empty or clogged: Even if levels look low rather than empty, the black nozzles can be dried or blocked so no black comes out.
- Composite black from color inks: Some inkjets make black by mixing cyan, magenta, and yellow, so an empty color cartridge stops black printing.
- Printer blocks printing when any cartridge is low: Many printers refuse all jobs until every low cartridge is replaced, to protect the printhead.
- Wrong print setting: Grayscale or a specific paper setting can route the job through nozzles that are clogged.
- Dried pigment black: Pigment based black ink clogs faster than color dye ink when the printer sits unused.
Is this normal?
It is common behavior, not a defect. Printers are designed to warn on low ink and often stop printing to avoid running a cartridge fully dry, which can damage the printhead. Clogging after idle time is also normal for inkjets.
Does it cause any problems?
You simply cannot print in black until the cause is cleared. Forcing a nearly empty cartridge to keep printing risks air entering the printhead, which can cause a harder to fix clog, so it is worth addressing properly.
How to fix or check it
- Check every cartridge level, not just black. Replace any that is empty, including color cartridges if your model mixes colors for black.
- Run the printhead cleaning cycle from the printer menu or software, then print a nozzle check. Repeat up to three times if the black bars are missing.
- Remove the black cartridge, check that any protective tape is off, wipe the contacts and nozzle area gently with a dry lint free cloth, and reseat it.
- If black is still missing, dampen a paper towel with a little warm water, hold the nozzle side of the cartridge against it for a few seconds to loosen dried ink, then reinstall and clean again.
- Try printing a black test document with Grayscale turned off, so the printer is not forced to use only the black nozzles if they are clogged.
- Replace the black cartridge if cleaning does not help, since a truly empty or failed cartridge will not print no matter what.
- If the printer refuses all jobs, replace every cartridge it flags as low, then resend the job.
Frequently asked questions
Why wont my printer print black when the cartridge is not empty?
The black nozzles are most likely clogged or dried, so ink is present but cannot pass through. Two or three cleaning cycles usually clear it. On printers that mix colors for black, an empty color cartridge can also stop black.
Can I still print if only the color ink is low?
On some printers yes, using a black only mode, but many models refuse to print until the low color cartridge is replaced, especially if they blend colors to produce black. Check your printer's settings for a black only or grayscale option.
Is it bad to keep printing with low ink?
Running a cartridge fully dry can let air into the printhead and cause a stubborn clog. It is safer to replace a cartridge once it is nearly empty rather than force it to keep going.