For this portrait as usual I used a canvas on board, and cropped it slightly to fit the subject. I started with a grisaille underpainting using Raw Umber and Titanium White and a little medium. I’m hovering between a straightforward Ivory Black and White underpainting, and other versions, mainly Raw or Burnt Umber and White. Burnt umber has a little more warmth. I’ve looked around online and you can see people painting with blacks which are made up of reds mixed with greens, e.g. Alizarin Crimson and Viridan Green, or again different blues and browns. At school I was taught by my militant impressionist teacher Mr. Baines that using black was sinful and one should only EVER mix blacks optically, and his chosen mix was Burnt Sienna and Cobalt Blue. You can mix a nice black from these two, but I went off Burnt Sienna a while ago (I’m sure I’ll come back to it – at the moment it just has a bit too much character, like someone talking very loudly at a party, so you can here them wherever you’re standing!). I think you can achieve a deeper black mixed from Burnt Umber and Ultramarine or Cobalt Blue.
Having said all that, in the name of efficiency I have stripped back all of my processes to avoid unnecessary headaches so I generally I use Ivory Black and Titanium White! I have also learned from Louis Smith that a little Alizarin Crimson mixed in with Ivory Black gives it more depth, so I also do this on occasion.
The thing is that I can achieve this depth at a later stage by glazing darker colours over the underpainting so again the Alizarin Crimson gets ditched when I want to simplify the process. I’m possibly lazy, but if you are working on something over a few sessions and have to mix the colours each time inconsistencies can creep in and so thats just another layer of process that can be removed.
You can see an example of the depth achieved through glazing in the image below where the grisaille is actually quite bland in comparison. Dark glazes in and around the eyes give huge depth (generally I won’t use black at this stage and mainly use Alizarin and Sap Green or Cadmium Red and Viridian, or blues or browns or whatever..). This is the first glaze and already it has transformed the tonal range of the portrait.