What is the origin of etching technology?

The origin of etching technology can be traced back to the 14th century from recorded data. At that time, people could only say that metal etching was a processing technology, and could not be raised to the category of process, because at that time and in the following hundreds of years, , etching only depends on the processor's own technical level to determine the processing quality, and not everyone can learn this technology. In the 17th century, the invention of strong acids and alkalis with strong etching effects, such as caustic alkali, led to new developments in etching technology.
Simply put, the etching process is an extension of the metal stamping process, also called photochemical etching, and some people call it corrosion. Hardware stamping is a form of die stamping, but the stamping process is relatively rough, with large tolerances and low precision. It cannot solve the problem of high-roughness parts. The etching process solves the demand for high-precision parts in industrial production. Etching uses photochemistry to transfer the drawing to the steel sheet. Through the principle of chemical reaction, the unnecessary parts are corroded away, and the parts of the product are retained.