With the development and continuous progress of society, metal signs are used more and more in various fields of modern society, especially in the fields of electronic products, home appliances, machinery and civil products. This popularity is mainly due to the fact that the metal signage has a unique etching method during its production.

　　So, what is the etching method for metal signs?

　　1. Provide the substrate and perform surface treatment on the substrate;

　　2. Coat the photosensitive material on the front and back of the surface-treated substrate;

　　3. Expose the front and back of the coated substrate;

　　4. Develop the exposed substrate;

　　5. Etch the front side of the substrate covered with the transfer film on the back side;

　　6. Paste the transfer film on the front of the etched substrate, and paste the transfer film on the back of the developed substrate;

　　7. Remove the film on the back of the substrate covered with the transfer film;

　　8. Etch the backside of the stripped substrate;

　　9. Remove the film from the front surface of the substrate covered with the transfer film.