The oldest known archaeological fragments of the immediate precursor to modern paper date to the 2nd century BCE in China. The pulp papermaking process is ascribed to Cai Lun, a 2nd-century CE 查看更多內容

The word paper is etymologically derived from Latin papyrus, which comes from the Greek πᾰ́πῡρος (pápūros), the word for the Cyperus papyrus plant. Papyrus is a thick, paper-like … 查看更多內容

Chemical pulping
To make pulp from wood, a chemical pulping process separates lignin from cellulose fibre. … 查看更多內容

Much of the early paper made from wood pulp contained significant amounts of alum, a variety of aluminium sulfate salt that is significantly acidic. Alum was added to paper to assist in sizing, making it somewhat water resistant so that inks did not "run" or … 查看更多內容

Before the industrialisation of paper production the most common fibre source was recycled fibres from used textiles, called rags. The … 查看更多內容

Paper can be produced with a wide variety of properties, depending on its intended use.
Published, … 查看更多內容

The thickness of paper is often measured by caliper, which is typically given in thousandths of an inch in the United States and in micrometres (µm) in the rest of the world. Paper may be between 0.07 and 0.18 millimetres (0.0028 and 0.0071 in) thick. 查看更多內容