teachingstudios:

John Singer Sargent,&nbsp;Caroline de Bassano, Marquise d&rsquo;Espeuilles&nbsp;(detail), oil on canvas, 1884
Sargent&nbsp;worked mostly with half tones before finishing a painting with the dark tones and highlights.
He&rsquo;s quoted as saying,&Prime;If you begin with the middle-tone and work up from it towards the darks so that you deal last with your highest lights and darkest darks, you avoid false accents.&Prime;