This will not alter technique or affect the surface of the finest art papers when used as directed. Dries in seconds to a matte finish which may be worked over with any art medium. Spray Fix causes the least possible change in delicate tints and values. Prevents maker, tempera, pencil, charcoal, pastel, chalk and opaque watercolours from bleeding one into the other. Soil and moisture resistant. Contains no fluorocarbons and free of lead hazards.