This is a heat shrinkable film with low cost and acceptable effect. This is a soft and transparent plastic film. Using its thermal shrinkage, the mounter first covers the surface of the drawing board, and then quickly pours a pot of boiling water on it. It shrinks and stretches flat on the surface of the drawing board, and looks as smooth as glass, which is very convenient. The film itself is harmless to the painting. As long as there are no holes when you look at it carefully, it may be a little dangerous for hot water to penetrate into the painting. Glass is harmless to painting, but it is heavy. It should be hung on the wall to ensure the safety of bearing, otherwise it will break when it falls. Heat shrinkable film has a limited life, is not resistant to wiping, and needs to be replaced after a long time.
200 yuan, look at the size of the painting. If it is mounted with mounting tape and plastic film, the painting is relatively large and worth it. If it is only covered with film, it is a bit deceptive.