C-41 is the chemical process introduced by Kodak in 1972. It is a chromogenic color print film developing process and … as far as chromogens go all you need to know is that they are applied in chemistry to a colourless chemical compound and via a chemical reaction, voila, it converts said compound into a coloured compound.
You should also know that there is no universally agreed upon definition of the term ‘chromogen’.
I have found that the c-41 chemical process when combined with time and vision … and blood – hot sauce – wine – kitchen cleaner – hot paprika – saliva – vinegar – citrus – and boiling water … well, it opens portals to alternative realities.
Alternative realities are also lacking a definitive universal definition.
In this universe anyway . . .