The remaining ones need to be packaged immediately to prevent moisture. The normal water temperature of 15-30 degrees Celsius is applied during the washing process. To dye the same step by step, in order to prevent the cloth from hardening, it is recommended to wash with live water. Due to the water-soluble nature of PVA, the film is susceptible to the air environment. If it is dry in the winter, the film will become hard in cold places. For example, in a humid and warm environment, the film will become soft, and the customer can replace the storage according to the actual situation. The environment can achieve the desired hardness.