古人把墨蹟刻在石上或木上, 後人在木刻和石刻上鋪上紙再上墨,就成了左面白字黑底的帖。在沒有印刷術的時代,臨帖是學書法的好方法。In those days when printing had not been invented, people carved calligraphy on stone or wood. Copybooks (the one with the black background on the left) were made by rubbing these stone and wood carve. Which one do you like better, left or right?