Gouache, if watercolor and acrylic had a baby
a method of painting using opaque pigments ground in water and thickened with a glue-like substance
has both watercolor and acrylic properties
sometimes called “opaque watercolor” because of its opaque nature
typically, you don’t want to use gouache right out of the tube… a little water goes a long way for giving you a more workable consistency
because gouache is water-soluble and water-permeable, when you paint over the background layer, you can sometimes bring up pigment from previous layers and create a muddy color
Because gouache is a fairly wet paint, you need a sturdy surface that won’t buckle and ripple when it gets wet. Choose a canvas board or stretched canvas rather than painting paper. And it’s always a good idea to prime your surface before you get painting.
Resources:
https://www.plazaart.com/blog/what-is-gouache/
https://www.craftsy.com/art/article/what-is-gouache/