It is assumed that the leveling of a pigment‐vehicle mixture is a function of surface tension, yield value, and dimensions of brush marks.A relationship is derived which takes the formh = d28 fγwhereh= depth of brush mark and is taken as a measure of levelingd= width of brush markf= yield valueγ = surface tension.Assuming reasonable values for γ andd, it is calculated that a pigment‐vehicle mixture with a yield value less than2.8 dynescm2levels satisfactorily.