Pebeo Huile d'Art Tube, 37ml, Ultramarine Blue Huile d'art are permanent, superfine oil colors with remarkable resistance to thermal and photo-oxidation whites are particularly stable to yellowing the paste is particularly smooth and the viscosity is constant from one color to another The colors may be thinned with solvents, oils or mediums depending on the desired effect Can be used on canvas, cardboard, wood and all other surfaces suitable for oils The paint is dry to the touch in 4-9 days for an average application Huile d'art super fine oil is available in 37ml, 80ml and 200ml tubes