The kind of paper was also called eternal red.In the Han and Wei Dynasties, people used corktree to dye paper yellow, improve the performance of paper, increase beauty of paper and prevent moth eaten.

• 汉魏时期已使用黄蘗汁染纸，黄蘗汁能将纸染成黄色，既改善纸的性能，增加纸的美观度，还能起到防虫蛀的作用。