

The square box with the cross in it has a similar issue, with the black lines a little higher than the blue ones and the shadow appreciate your efforts. The vertical lines look OK at first, but close examination shows the black lines to be slightly higher than the others and with the grey shadow below. The color bars are all OK, as are the two grey bars, but the black bar is very slightly higher than the rest and has a grey shadow below it. When I print the test page from HP Print and Scan Doctor, all of the alphabetic characters have the shadow below them. I have also uninstalled and reinstalled Adobe Acrobat DC. I do not have the problem when printing to our old Xerox Phaser 6180. I have reinstalled the printer driver (dated in 2015!), aligned the cartridges (HP brand) numerous times and replaced the black cartridge, all to no avail. It does not occur with Excel or Word documents if printed with the printer properties set to "normal", but does if that property is set to "best".

The problem occurs when printing PDF files with Acrobat or Corel, as well as web pages with Chrome with the print properties quality set to "normal" but does not occur withe quality set to "fast draft".


I, too, am having problems with my Officejet 4500 G510n-z printing a gray shadow below anything black.
