论文部分内容阅读
拓版法是将原书用酸液浸泡,使书上的油墨字迹变黏,直接转上石头或锌皮的一种方法。这种方法的目的是为减去照像等手续,藉省资金,或者为了节省时间。有时一种秘密文件,需要在最短的时间内将全文一字
Extension version of the original book is soaked in acid so that the ink on the book becomes sticky, directly to the stone or zinc skin a method. The purpose of this method is to save money by saving money by subtracting procedures such as photographing or to save time. Sometimes a secret document, you need the full text in the shortest possible time