活字印书,始于北宋。沈括《梦溪笔谈》云:“庆历中布衣毕昇始为活版,其法用胶泥刻字,字薄如钱,每字为一印,火烧令坚。先设一铁版,其上以松脂和纸灰之类冒之,欲印则以铁范置铁版上,密布字印。满范为一版,就火...