A colour inkjet printer that ramps up the resolution to new heights is now shipping from Lexmark. Lexmark representatives say the company has cranked up resolution for the Z52 to an astounding 2,400-x-1,200 dpi, and that it can print at full resolution on plain paper. That's the same resolution that high-end typesetting systems produce on film. While 2,400dpi is unlikely to do much for ordinary paper, it may look great on glossy coated paper; Digit is still testing the Z52 and does not have final results. Lexmark makes another astounding claim for the new printer: The company says it handles printing speeds of 15ppm in black, and 7ppm in color. That's about half again as fast as Lexmark rates the Z52's predecessor, the Z51. Can the Z52 live up to its performance claims? Again, testing is pending. However, the challenge in its performance will be when printing ordinary documents at standard resolution. Lexmark, like most other printer vendors, specifies printer speeds based on very simple documents printed in draft mode. The unit adds some welcome capabilities, such as an optional six-color ink cartridge that is designed to produce superior photographs. The Z52 also has USB support and drivers.