HP Deskjet 3820 Color Inkjet Printer - Manual (Page 54)

calibrating print cartridges
After installing a print cartridge, calibrate the print cartridges to ensure great print
quality.
Calibrating the print cartridges takes about two minutes and requires you to examine
two test pages.
To calibrate print cartridges:
1. Go to printer maintenance .
2. Click the calibrate printer button.
3. Click calibrate , then follow the onscreen instructions.