Not only is your linework impeccable, but dude is laying in the albedo and specular with the same color. I can tell the pigment is transparent but what pigment is it exsactly? It seems like cadmium red but thats too opaque, or is the black mixing with the red to make it seem more transparent?
Not sure on the exact weight, I just ask for Pelon at the local store. Cutting it I use scissors and a wood burning stencil tool to burn the wholes in my lines
