1, gouache is a pigment with higher consistency than watercolor. Compared with watercolor, gouache is more vivid and dense.
2. A large amount of white powder is added in the production of gouache pigment, which has strong hiding power and is very suitable for covering with thick pigment; Watercolor pigments are relatively pure, except for a few pigments, which are rarely mixed with white powder, so they have no hiding power and are very transparent. Only very thin colors can be superimposed when painting.
3. Different painting procedures. The process of gouache painting is basically to draw a dark color first, and then a light color. The brighter and whiter the color, the more it should be portrayed at the end. Watercolor, on the other hand, is to draw a light color first, and then a dark color. The brighter the better, it should be painted first.