The copperplate is also called coated paper, which is called powder paper in Hongkong and other areas. It is a high grade printing paper made of white paint coated on the original paper. Mainly used for printing books cover and illustrations, senior color pictures, a variety of exquisite product advertising, packaging, trademarks, sample.

The special paper is different by copying machine made of fiber with special functions such as single use paper, synthetic fibers, synthetic pulp or mixed pulp and other raw materials, with the modification or processing of different materials, the paper gives different functions and purposes, such as life, building materials, electrical products, and agriculture with the information, culture and art, optical, biochemical technology and so on, as long as it is used for the special purpose of the paper, all collectively referred to as the special paper.