Print text using black ink on HP Laserjet color printer

I have a HP LaserJet CP1025NW (color) printer installed on a Linux Mint 20.1 machine using HPLIP (required plugin installed, version 3.20.11). For some reason, whenever I try to print a document (e.g. PDF, a text file, etc.) with black text inside, the text is *always* printed using the three CMY colors. The result is not as pretty looking as if the text had been printed using the black cartridge only; also, it is a waste of ink. Notice that if the *same* document is printed via a Windows machine on the *same* printer, I get the expected result of black text printed in pure black. I could not find any option (neither in CUPS, nor in HPLIP) to adjust this undesired behavior. Any help is appreciated.