Corin Royal Drummond wrote:Blend with linseed oil to make oil paint, gum arabic to make watercolor and gouache, hydrolized cassein protein to make milk paint, and beeswax to make encaustic.
Don't forget Egg Tempera (egg yolks thinned with water), sifted/cleaned clay for earth paint, and hide glue (boiled rabbit skin).
Also, in your process you say to dry the pigment in an oven, but for less energy use it can be poured onto a plate and left to dry.
Black can be made with charred bones.