Colours: opaque and high brilliance. Can be mixed with each other. Very good lightfastness.Diluent: Ceramic/Vitrail thinner.Cleaning the brushes: Ceramic/Vitrail thinner.Surfaces: porcelaine,earthenware, ceramic ...Drying: by oxidation in air, touch dry in 3 hours, completely dry in 48 hours.Caring: when dry, colours resist to scratching and to washing in cold water without soaking.