Citadel Shades are specially designed to flow over other paints and settle into the crevices of your miniatures, defining details and highlighting the recesses. Once applied, they dry to provide very effective shading for your models. All Citadel paints are non-toxic, water-soluble acrylics and are designed for use on plastic, metal, and resin Citadel miniatures. Each container contains 18ml of shading paint.