In the output of film, is the selection of the film facing up or down? What is the difference?

When the film is output, it is determined whether the film is facing upwards or downwards depending on whether the film is positive or negative. When a film is taken out, whether the film is facing upwards or downwards is an anti-positive film. When a negative film is selected, the medicine film is selected facing upwards to obtain a positive film. Because for the positive film, the film can be directly printed, the film surface is just in contact with the PS plate, and the printing effect is good. For the negative film, it must be copied into a positive film before the printing version, in the copy, the negative film is placed on the copy table, the film is facing up, and then stack the copy film, so that the film also happens to be in contact with the film surface To ensure copy quality. During the printing and copying process, the light source does not directly shine on the film surface.

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March 03, 2020