I used Humboldt medium-thick 190g8K four-sided sealant to draw portraits, and I also encountered wrinkles. If it is the background part, I generally don't care, and color accumulation can also form a natural effect. If your face is too wet, don't write. Once piled up, you can push it away with a pen, or directly absorb the color with a paper towel, dry it or blow dry it, and then brush it with watercolor in a small area, so it won't wrinkle.

The water absorption and ductility of watercolor paper should be taken into account. The overall cost performance of Humboldt paper is very high. Miao's father hoarded a large roll during the epidemic and cut some out when he used it. A roll is very cost-effective, and a large roll of 300g is around 350 yuan, which is enough for a long time.