First, dark color and bright color: from dark color to bright color, bright color is mostly thick coating. Draw a darker color first, which is easy to be covered by bright colors; On the contrary, it is generally to draw a large area of dark colors first, including dark parts and bright parts and heavy colors.

Second, the whole first and then the part: from the whole to the part, gouache is a kind of color painting. Like watercolor and oil painting, it begins with drawing large color blocks and dark blocks. It is a principle to look at the whole and proceed from the general, and large color blocks and colors play a decisive role in the tone of the picture.

Third, juxtaposition has skills: for a picture dominated by bright colors, it is still necessary to draw a bright big color block first, the color is slightly lighter, and then add a small piece of dark color.

Four, thick coating method: from Bo Tu to thick coating. Bo Tu diluted the pigment with water, just like watercolor painting. According to the overall color feeling, he quickly Bo Tu again, resulting in the overall color environment of the picture, and then gradually thickened and expressed in depth.

Gouache is a painting painted with gouache pigment, which has a strong hiding power. In the presentation of the picture, thick water is not like oil painting, while thin water is more like watercolor painting, which has some characteristics of oil painting and watercolor painting. Gouache pigment is a kind of water-soluble powdery material with high purity, bright and saturated colors, strong expressive force, easy to handle large areas of color blocks and pictures, simple drawing method and quick and in-depth representation of objects.