Double Copper Card is divided into single-sided and double-sided coated types. 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. Coated paper, also known as coated printing paper, is a high-quality printing paper made by coating white paint on base paper. Coated paper comes in single-sided coated paper and double-sided coated paper. There is a distinction between matte coated paper and fabric-textured coated paper.
Both single-coated and double-coated paper are coated paper. The paper surface is very smooth and flat, with high smoothness and good gloss. However, double-sided coated paper is smooth on both sides, while single-sided coated paper is smooth on only one side. However, the stiffness and hardness of single copper are both higher than those of double copper. Moreover, the single copper is a bit yellowish and its luster is not as obvious as that of the double copper.