Progress on the underpainting in grisaille for the Thomas panel since abandoning egg tempera.

I have been working with Tad Spurgeon’s text lately.  It is chalk-full of information on the craft of painting, from technique to philosophy, historical research and criticism to in depth analysis of oils and their endless permutations, pigments, resins, additives, and etc, with many useful formulas and recipes.  I have not explored enough to venture a review, but I am enjoying it.