一般航空产品的零部件,制造完工后都必须标上图号、批次、工艺、操作者工号、完工日期以及检验等印记。由于航空零件不允许打钢印,所以只能用色印做标记。以前我厂所用的印记墨水是国外进口的。最近我厂在上海制笔研究所等单位的协助下,研制出了以酒精、颜料、树脂等为主要原料的金属用印 Parts and components of general aeronautical products must be marked with drawing number, batch, process, operator number, completion date and inspection mark after manufacture. As aeronautical parts do not allow playing stamps, they can only be color-coded. In the past I used the imprint ink is imported. Recently I plant in Shanghai Institute of Pen and other units with the help of alcohol, paint, resin, etc. as the main raw material of metal printing