Savoir-Faire Opaque Watercolor Gouache is a distinctive and inspiring line of paint designed to spark untapped creativity. French School Opaque Watercolor Gouache has vibrant bright colors that are completely washable and non-toxic. They are opaque to semi-opaque when applied directly but when thinned with water, they become transparent for watercolor effects. They are versatile, easy-to-use paints for students and artists of all ages and can be used on a wide variety of surfaces including paper, hardboard, plastic, wood and metal.