'Details determine the success or failure of corrosion signs'

Just look at it and heat it to 15 ~ 30 degrees, 3 development: with a good developer (This kind of drudgery is basically done by the administrator. Put the exposed board into the developing liquid, and the developing time depends on the temperature and the concentration of the solution. The normal value is about 30. Note: investigate the anticorrosive coating at any time, and when the reaction of this layer is finished, clean the board in clear water 4 Etching: place the developed Board in etching solution, the etching solution is normally heated to about 60 degrees, and 5 vias can be taken out after the remaining copper reacts: the whole process of using the electric drill corrosion machine is as follows: 1. Relevant to the corrosion sign drawing: 1. Take 1mm2 of the outer diameter of the transparent sulfuric acid paper pad and the line width is preferably greater than 0. The 254 line cannot be too close to this. The color is black. 3 Print share year-on-year. Vacuum, 2 height exposure: place the corrosion plate with the protective layer torn off under the printed one. Operation note: single panel, 1 double panel is set to open the upper and lower exposure lights (No electricity. Also set it to open up and down, so as not to forget that the exposure time of 2 sulfuric acid paper is set to about 140, and the exposure time of white paper is set to about 240 (White Paper is not good, I have to use it again)