A negative film strip one

Kodak Porta Films.

A color negative film is a photographic film that, after its development, reproduces gray values and colors in the opposite ( complementary ) tone values. The tonal value reversal requires and enables a positive image or any number of images from the individual negative to be exposed in a further process. We then hold the classic "photo" in our hands.

Different photo sizes and different surfaces can be exposed from a color negative film.

The most popular sizes are (in cm): 9x13; 10x15; 13x18; 20x30; 30x45; 40x60 or 60x90 -

the surfaces of the pictures are usually matt or glossy.