This is referenced from yet another photo I took from the train. The photo is blurry but even these are still usable as a reference even if the real expression can’t be seen well. I just kind of drew something.
The pen was just a black Pentel Slicci. That was followed by various mixes of cerulean, cobalt teal, ivory black, van dyke brown, yellow ochre, and a couple of other yellows already on the palette that I’m not sure what they were. Some were watercolor and some gouache. The brush used for everything was a Princeton 6300 size 10 bright. It’s a very stiff synthetic brush meant for thick oil paint, just the opposite of pretty much all watercolor brushes, but the way it handles can be an advantage. The stiff bristles are robust and hold up well in a faster and more aggressive approach to a painting.