Michaela the instructor convinced me to try Rötel, i.e. the red earth chalk, on colored paper.
The ones below were drawn with pencil-like sticks, some with the chalk in the form of square sticks, as very dry pastels. All of this needed to be fixed with aerosol fixative. The images below are from two sessions, the model would normally stay still in each pose for about 15 minutes. The earliest attempts first, then more recent ones. The paper is light brown/gray, and fits the chalk colors nicely. I used white chalk for highlights, as is customary. First, I mixed the various chalk colors, then realized this was no good, and went against tradition. All the drawings are made on the same type of pastel-paper, maybe 70 x 50 cm in size.