Grumbacher MG Underpainting White, 5.07 oz Tube, Titanium White Permanent and fast-drying; Made in USA Used in underpainting or in wet-in-wet (alla prima) painting; Create surface textures and impasto techniques Specifically formulated to create a lean, dry paint film, MG Underpainting White has enough tooth to readily accept glazes In normal applications, MG Underpainting White dries to the touch in 4 to 6 hours and may be painted over immediately. To dilute, mix it with Pure Gum Spirits of Turpentine or Grumtine only