Gouache is the abbreviation of gouache painting, and there are many names in China, such as "propaganda color". Compared with acrylic pigment (or "concentrated advertising pigment"), its coverage is weak. It belongs to a special kind of watercolor, namely opaque watercolor pigment. Because it is cheap, easy to learn and easy to use, it is often used as an introductory painting material for beginners to learn color painting, and its usage simulates oil painting techniques or watercolor techniques.
Gouache, also known as advertising color, is an opaque watercolor pigment. Can be used for thick coloring, and uneven phenomenon will not appear when coloring in a large area. Although they all belong to opaque watercolor pigments, gouache is generally cheaper than propylene; But it is slightly inferior to propylene in coloring, color number and preservation. It should be used selectively according to different purposes.