Water Sensitive Paper for laser printers is a special functional paper specially designed for laser printing technology, and its surface is coated with a chemical coating that is sensitive to moisture. When paper comes into contact with moisture or a humid environment, the coating will rapidly undergo a color reaction (such as turning blue, red or showing spots), forming a clearly visible mark, thereby intuitively indicating to the user that the paper has been damp or exposed to water. This product is suitable for scenarios with high requirements for moisture resistance, such as document printing, label production, and the protection of important documents.