The plate making you mentioned belongs to prepress, and the workload before prepress is the most leisurely in the printing field. Moreover, if you work overtime, it's not your plate-making staff, but the workers who operate the printing press. If you print/kloc-0,000,000 copies and/kloc-0,000,000 copies, the workload is the same for the plate-making staff, except that the master who operates the machine has to stay up late.
As for the process, customers bring samples, which may be handwritten drafts. You need to turn them into electronic drafts. If there are pictures, you need to scan them, and then use typesetting software to organize the contents into the final style. Then, after some processes, you can make them into a printed version that can be printed on the computer, and then print the printed version on the printing machine. And your job is in the processing of some working procedures I mentioned. In fact, there are not many things, just the accumulation of experience, and you can basically master them after being familiar with them for one month.
In fact, the profit of the printing factory is still very rich (large-scale), and sometimes the speed of making money is equal to the speed of printing money. I know a company that bought 35 million machines and recovered the cost in less than two years. Now that the family has found it, and it is a big unit, the treatment is good.