What's the difference between gouache and ink painting?

Gouache painting is a kind of painting made by mixing water and powdery pigments. It is a kind of painting between oil painting and watercolor painting, and it is a painting art introduced to China from the west. Opaque gouache pigment and oil painting pigment are both pigments with hiding power, so gouache is a kind of painting between watercolor painting and oil painting. It absorbed some methods and techniques of watercolor painting and oil painting, and formed its own technique system.

Ink painting is considered as the representative of traditional painting in China, that is, Chinese painting, also known as Chinese painting and Chinese painting. With ink as the main raw material and clear water, different shades (black, white and gray) are drawn with thick ink, light ink, dry ink, wet ink and Jiao Mo, forming a painting form with ink as the main body.