How many colors of photosensitive layers are used in color photographic negatives now?

The photosensitive materials of modern color photography are all based on "subtractive method" to record the blue, red and green photosensitive layers.

From top to bottom.

Color negatives and negatives:

Gelatin protective layer;

Upper emulsion layer-blue photosensitive layer;

Yellow filter layer;

Intermediate emulsion layer-green photosensitive layer;

Gelatin interlayer;

Lower emulsion layer-red sensitive layer;

Anti-corona layer;

Bottom layer;

Film base;

The back layer.

Positive film:

Gelatin protective layer;

Upper photosensitive emulsion layer-green photosensitive layer;

Gelatin interlayer;

Intermediate latex layer-red photosensitive layer;

Gelatin interlayer;

The lower emulsion layer-blue photosensitive layer;

Bottom layer;

Film base;

Back layer (anti-halo layer).

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Not the concept that the more the better. In fact, the principle of film pasting is very simple, which is a way to reduce color. No amount of color will improve the imaging color.