Here is tonight's work. Black Iron Oxide, Raw Umber Green, French Ochre, and Gold Ochre. I found that rolling out on paper towels was easiest for controlling the sticks.
I'm going to refrigerate the solutions just in case I decide to whip up another batch. But first I think it's time to try out the product! Besides, my Old Master copy work is waiting for my return.
An interesting byproduct is that these pastel sets make a good color chart of my pigments, nicely detailing what pigment mixes with white in oils and egg tempera would look like.