Here's why:
* Paper has a long history: Papermaking originated in China around the 2nd century AD, using a process involving plant fibers and water. This process, though refined over centuries, remained the basis for papermaking for many years.
* Modern advancements: While the core principles of papermaking remained the same, there were significant advancements that improved paper's quality and production:
* 19th century: The invention of the paper machine (1807) revolutionized paper production, making it faster and more efficient.
* 20th century: The development of synthetic fibers, like rayon and nylon, led to the creation of new types of paper, including more durable and water-resistant varieties.
* Present day: Ongoing research and development continue to create new types of paper with unique properties for various applications.
Therefore, rather than a specific invention date, we can say that modern paper is the result of a continuous process of innovation and refinement that spans centuries.