We expect someone to solve this problem in the near future, allowing the holy grail of a CMYK print head to come to fruition. You can see a demo video of [RichRap]’s tri-color print head after ...

If your printout has lines or blurry text, you need to clean your printer’s print head. Over time, the ink gets stuck on the print head, and if it does not, it remains unclear, resulting in ...