Complex sentence: Color film is black and white film with three layers of emulsion, which have a color coupler that makes the resulting black metallic silver deposits in the negative respond to colors in the visible spectrum; red, green and blue.
Split into simpler sentences: Color film is black and white film with three layers of emulsion. Each layer has a colored coupler that makes the resulting black metallic silver deposits in the negative respond to colors in the visible spectrum; red, green and blue.