There are many aspects to judge the quality of cling film. Smell is a simple and feasible method. As long as you open the package, you can smell the  cling film. Qualified products have no smelling, once the product has a smelling, the quality is unqualified

Look at the color. The higher the transparency of the cling film, the better the quality. Similar yellow cling film is made from waste recycling, and its quality is poor.

Look at the elasticity of the cling film. When the cling film is pulled, the quality of the cling film that is easy to break is very poor, which is also very important. The quality of a product depends not on its thickness, but on its toughness. The higher the toughness, the better the film quality.

At the same time, pay attention to distinguish between the material and production date, especially whether it is a qualified product from a regular manufacturer, and avoid purchasing and using inferior cling film products.