DES etching film removal and film removal production line development process is a key step in the development process, the use of development fluid and unexposed dry film chemical reaction, the generation of soluble substances, which are dissolved in the development fluid, and for the part that has been exposed, because of its dry film or ink will not be dissolved, so it can be washed out of which leaves unexposed part, these parts constitute the inner layer of the line graphics, through the development process completed on the circuit board The image is exposed and processed through the developing process.