For Canon printer, You can make Canon printer prints darker by adjusting the print density setting in the printer driver's dialog box or the RJ Utility. -5 is the lightest, and +5 is the darkest. People also asked Why is my Canon printer printing faded? Ever wonder why your prints sometimes appear faded or streaky? It's usually because the printhead inside your printer is clogged or dried out. Like with most printers, Canon printheads can clog due to ink or dust drying up and collecting in the nozzle.