Greetings folk

I just recently learned in my oil art class doing glazing, that is paitning a picture at first in black and white and then glazing the colour over it. I think there is another more professional term for this but I have forgotten it.

My teacher told me that people generally don't do this very often anymore but I wanted to see if any of you have and if you have pictures of your work, share it here

I think it's a really interesting concept and a lot of the old artist suposedly used this technique. I also thought it was a great practice to work only in black and white, planning to do more of that.

On another topic, has anyone experience in painting in tempera?