How do I know if the printer prints black with a mixture of color toners or black toner?

Question

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How do I know if the printer prints black with a mixture of color toners or black toner?
For example, there is a Color MFP HP LaserJet Pro M377dw, I print a regular document without colors from Word (black text by default), how to find out how it prints black. Is there an option in the printer settings to print in grayscale? And then it will be necessary to turn it on every time when there are colored inserts?
It would be logical if the printer printed black with black toner, and the color elements were already mixed colors.
Thank you.

Answer 1

Print a small B&W gradient from white to black, arm yourself with a magnifying glass and take a closer look.
First, the shade. It will be tinted if colored inks are used.
Secondly, when you zoom in, you can see the colors of the ink dots.

Answer 2

The HP LaserJet Pro M377dw has a black cartridge in addition to color cartridges, you can find out by opening it or reading it in your passport. So black prints in black. What is the question?

Answer 3

In order to print without the use of color cartridges, you must enter the "printer properties", open the "labels" tab and select "black and white" in the "color options" field.