According to legend, there was a county magistrate named Xu Xun in Jingyang County of the Jin Dynasty. He was brilliant in spells and was called Xu Zhenjun. One year, due to poor harvests, farmers could not pay taxes. Xu Xun asked everyone to pick up stones and cast spells. With a wave of his finger, the stones immediately turned into gold, and the people were able to deduct the tax owed. Since then, people have hoped that they also have a "golden finger" that can turn stones into gold. It is true that turning stones into gold is just a beautiful legend, turning stones into paper has become a fact. Let's talk about how the stone becomes "stone paper".
Stone paper, as the name suggests, is paper made of stone. Of course, this is a popular understanding. In fact, stone paper is made of inorganic powders such as calcium carbonate as the main raw material, with food grade pp or food grade pe and additives as auxiliary materials. A new type of paper product produced by special processes such as film.
It can be seen that stone paper is completely different from paper made with cotton, linen, wood and other plant fibers in the traditional sense. Since Cai Lun in the Eastern Han Dynasty invented papermaking, plant fiber paper has dominated the world for thousands of years. Until the 1950s, DuPont and other companies in the United States began to develop paper based on organic resins instead of plant fibers, called synthetic paper. It is called chemical film paper, plastic paper and so on. Japan, out of concerns about insufficient wood sources and reducing organic resin inventories, also increased the development of synthetic paper and took the lead in commercial production in the 1970s. Synthetic paper was also developed in our country in the 1970s. At that time, it was called "calcium plastic paper", but it was not used on a large scale. At the end of the 20th century, Taiwanese enterprises in my country developed stone paper with a calcium carbonate content of 60% and realized commercial production. China has only begun to develop and introduce stone paper production technology in the past ten years.