Once I have secured my design with the Trapping steps, I then need to add to my VALUE REGISTER so that I can control the values of my “Colored Umber” layers. I love to paint on the Ampersand clayboard surfaces as they are most like the surfaces that the early Flemish used. When this surface is sealed it is no longer white but picks up a warmer cast and drops in value to around a #9.5. That is my first given value. Drama is most easily produced with a darker value background, so the next thing I usually do is to BEGIN to drop my background value to around a value #5.