Gouache Paintings by Jim Griffiths

Gouache (/ɡuˈɑːʃ, ɡwɑːʃ/; French: [ɡwaʃ]), opaque watercolor, or guache, is one type of watermedia, paint consisting of pigment, water, a binding agent (usually dextrin or gum arabic), and sometimes additional inert material. It is designed to be used with opaque methods of painting. Gouache has a considerable history going back over 600 years, and the term derived from the Italian guazzo, also refers to paintings using this opaque method.