Double Copper Card is lighter and thinner than coated card paper. The uses are also different. Coated paper, also known as coated printing paper, is called powder paper in regions such as Hong Kong. It is a high-quality printing paper made by coating white paint on base paper. It is mainly used for printing the covers and illustrations of high-end books and periodicals, color pictures, various exquisite product advertisements, samples, product packages, trademarks, etc. Double-coated paper is divided into single-sided and double-sided coated coated paper. According to the classification standards of the Japanese paper industry, the coating weight on each side is approximately 10g/m2 or more. It is one of the most commonly used paper types in the cultural publishing, advertising design, printing and binding, and business industries at present.