What is a gouache?

A watercolor paint that's opaque unlike the usual transparent watercolors. It gives an artist the freedom to paint layers from the light to the dark ones. Gouache is often used for the solid colors when painting. It is a type of paint in the wide category of the water-media that consists of a pigment, binding agent and an inert material designed specifically for use in a method that is opaque. (Image © Botyev Volodymyr/Shutterstock)