Gouache
Gouache (from the Italian guazzo, "water paint, splash") is a paint consisting of color pigment suspended in water. Gouache differs from watercolor in that the particles are larger, the ratio of pigment to water is much higher, and an additional, inert, white pigment such as chalk. Gum Arabic is also present as a binding agent just like in water colours. This makes gouache heavier and more opaque, with greater reflective qualities.