Metal etching machine etching technology in the process of making the screen, sometimes in the graphic part of the phenomenon of development is not transparent, mainly for the following reasons:
1. It is too long to dry the screen in the incubator or the temperature of drying is too high, both of which can make the screen of the coated photoresist produce "heating" before exposure, if re-exposure Excessive exposure is produced, so the image is difficult to see through.
2. When the photosensitive adhesive is applied, since the number of coatings is large, multiple exposures are not caused by the light-shielding operation during coating, and it is difficult to reveal the image when exposed again.
3. The intensity of the light source is too large, and the exposure time is too long, resulting in overexposure, which makes development difficult. Sometimes the contrast of the image is too small, and overexposure occurs during exposure, which makes development difficult.
