Above: Pentel Pocket Brush Pen Sketch with layers of gouache added with a 3/4 inch filbert and smeared around with a paper towel; in my 9 x 12 inch in-studio Fabriano Venezia journal. Click on the image to view an enlargement.
The other night I just went forward with the PB60 (Indanthrone Blue) that was already on my palette. I've been experimenting with Cobalt blue lately, but it seemed time to return to my favorite blue. I added white to the blue for the tint used at the side and in some other areas.
All the gouache used in this painting was Schmincke gouache. They have PB60 in their line. M. Graham does not (which is why I started "Project 640 Tubes").
That's all I really have to say about this. Some people have comfort foods (mine is tuna and rice) and some people have comfort pigments. I have both.