民间传说,东汉建光元年(121年),造纸家蔡伦死后,他的弟子孔丹在皖南以造纸为业,很想造出一种世上最好的纸,为师傅画像修谱,以表怀念之情。但年复一年,难以如愿。一天,孔丹偶见一棵古老的青檀树倒在溪边,由于终年日晒水洗,树皮已腐烂变白,露出一缕缕洁净的纤维。孔丹取之造纸,经过反复试验,终于造出一种质地绝妙的纸来,这便是后来有名的宣纸。宣纸中有一个名叫“四尺丹” Folk legend, the first year of the Eastern Han Dynasty Jian-Guang (121 years), after the death of the paper-maker Cai Lun, his disciple Kong Dan in southern Anhui for paper industry, would like to create one of the best paper in the world, Table miss the feelings. But year after year, it is hard to do so. One day, Khon Dan occasionally fell down an ancient eucalyptus tree at the stream. As the sun shines throughout the year, the bark has become rotten and white, revealing a plume of clean fibers. Kong Dan took the paper, after repeated tests, finally made a wonderful texture of paper, which is later famous rice paper. There is a paper called “four feet Dan”