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Who knows anything about the science of developing film? I understand that when two light photons hit a silver halide, the silver halide then becomes a silver atom, put billions of these in a layer of a gelatin and put it on a film base and you have your light sensitive film. But when you develop the film, the developer will remove the silver halides that haven't deposited a silver atom, but if that's all it does, why isn't the processing time constant? Is it the longer you process, the more silver halide is removed, but ...how could that work if the film's no longer light sensitive? Does the fixer stop the silver halide from being light sensitive? Is it the more silver halide is removed during developing the brighter the image gets, and it's the lack of silver halide that makes the silver atoms appear larger, which is why push processing creates a grainer image? I really don't know and I am confused.

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