Do you need to cooperate with the printing machine to produce negative or positive films? There are D printers that use negative films, D printers that use positive films, and D printers that use both negative and positive films. So you have to go to the printing factory? It’s a habit. You'd better ask first. If the printing factory is used to using all positive and zinc plates, then negative ones are not used. If there are Ds in the house, the negative and positive parts are not added.

I read that the negative parts should be like medicine. When the film is hung downward, the vaginal film will reflect white, and when the film is downward, it will look like a male film. However, using a cutter on the film can remove the black powder. This film is mostly used for silk screen printing and pad printing. When the film is hung downward, the film will turn white. The negative film is more clear than the film. With the positive film, that is, the drug film facing upward, use a cutter to remove the black drug powder on the front of the film, which is used for general four-color printing. I wonder if there is anything wrong? My experience is similar!

Actually, when you have nothing to say, when will you fight? The most important thing is to check what kind of zinc plate you use in the future. If you use a positive zinc plate, of course it will produce a positive film, and on the contrary, a negative zinc plate will produce a negative film.

Reference: myself