What is the special paper for commandment books?

Xuan paper.

According to the purpose of the paper used in the calligraphy writing of the Book of Commandments, the main paper is Xuan paper, and the colors can be matched at will. Among them, the Book of Commandments written by Zhuge Liang, a six-foot Wan Nianhong Xuan paper, is very ornamental and widely circulated.

Xuan paper is a traditional paper for painting and calligraphy in China. It originated in Jingxian County, Xuancheng, Anhui Province, and was named "Xuan Paper" after the government ruled Xuancheng. Xuan paper is a unique handicraft in China. It has the characteristics of soft and tough texture, smooth as jade, not decaying and ever-changing Mo Yun. Enjoy the reputation of "Millennium Life Paper" and be known as "National Treasure".