It looks like your print is unfused. Be sure to select the corect paper type.
I am having this same issue. Just when printing black. It happened with labels... and then when printing color (but just to the black).
Unfused means the toner is not fixed well on the paper. This hapened when the settings for paper in driver are not set correctly, when quality of paper is poor or if the fuser module is defective.
I have an original toner from xerox.
What exactly means "unfused" ?
Your print is unfused. It is possible to have an non-OEM black cartridge.?
Please clarify your question.
If I print a few pages of text in black color, text on every 2-3. page is "double printed". See photo below.
I replaced the black cartridge for a new one, but still the same problem.
Other colors (yellow, red, blue) is fine.
Thank for any advise