Is the negative the original?

Negative film is a part of the original film, and the pixels are destroyed after rough modification in the photography shop, which is equivalent to waste film and cannot be reused. The original film is an unprocessed photo after shooting, which can be modified and adjusted at will.

A negative is a photo after post-adjustment or production, such as adjusting exposure, contrast, color scale of each color, etc. The original film is an image file without any adjustment or modification. The negative is silver salt photographic film, also called film. Made of PC, PP, PET and PVC. Film generally refers to film, but also refers to negative film in printing and plate making. There is usually an English symbol on the corner of the film, which is the number of the film.

Film color discrimination

Generally experienced prepress workers often use this method to distinguish, because it conforms to the principle of color separation, so it is very accurate to use. As we know, after color separation by filter, each color version has its basic color and opposite color, such as magenta version, whose basic color is magenta, red, blue purple and black, and the opposite color is yellow, cyan, green and white.

From the perspective of film color separation. Generally speaking, the angle of the yellow version is always 90 degrees. This angle arrangement is based on the characteristics of weak color swatches. Because magenta, cyan and black are all strong color plates, to avoid moire, most of them are arranged at an angle difference from 45 to 30, that is,15,45,75.