GOUACHE
Gouache is similar to watercolour and has the same binding agent, gum arabic, which means that both media can be re-wet once dry, but it can be used on a variety of absorbent and non-absorbent painting grounds (paper, board, canvas etc). It is also similar to acrylic and oil paint in that it can be used in an opaque painting style; because of this versatility gouache really occupies the middle ground among media.
Schmincke gouache