Pebeo Fragonard Extra Fine Oil 37-Milliliter, Prussian Blue The fragonard extra-fine oil range consists of 104 intense and permanent colors divided in 5 series of which 36 monopigment colors and 3 primaries; the colors present a constant viscosity from one color to another and can be mixed together The colors are dry to the touch after allowing to dry 9-14 days for an average application Can be applied on canvas, cardboard, wood and many other surfaces To thin the colors use solvents, oils or mediums depending on the desired effect Clean brushes with essential oil of petroleum