What type of paper does the three proof thermal paper belong to?

Three proof thermal paper belongs to a special type of thermal printing paper. Thermal printing paper is a type of processing paper, which is manufactured by coating a layer of "thermal sensitive coating" (thermal color changing layer) on high-quality base paper. Thermal paper can be divided into single proof thermal paper, triple proof thermal paper, five proof thermal paper, and long-lasting thermal paper according to their different protective properties. Among them, the three proof thermal paper has the characteristics of waterproof, oil proof, and alcohol proof. Compared with ordinary thermal paper, it has stronger scratch resistance and longer storage time, usually up to 2 years.

The structure of three proof thermal paper usually includes three layers: the bottom layer is the paper base, which provides the basic strength and support of the paper; The second layer is a thermosensitive coating containing special thermosensitive chemical materials that undergo color changes and form images or text when heated; The third layer is a protective layer used to improve the durability, waterproof, oil resistant, scratch resistant and other properties of thermal paper.

Due to its unique performance and wide range of applications, three proof thermal paper has been widely used in retail, logistics, catering and other fields for printing labels, receipts and other items that require durability and certain protective properties.

In summary, three proof thermal paper is a type of thermal printing paper with special protective properties, unique structure, and wide applications.