塑料模和压铸模上经常要根据工件的要求制作文字或花纹。一般采用手工雕刻或照相制版腐蚀的方法。但是手工雕刻需要工人有较高的技术,生产周期也较长;而照相制版腐蚀也有工艺较为复杂、设备条件要求较高等困难,所用的腐蚀液也容易对环境造成污染。这两种方法对小型的工厂来说都 Plastic molds and die-casting molds are often based on the requirements of the production of text or patterns. Generally used manual or photolithography etching method. However, hand-engraving requires workers with higher technology and longer production cycle. Photolithography also has some problems such as more complicated processes and higher equipment requirements. The used etchant also easily pollutes the environment. Both methods are for small factories