Color film uses three emulsions that are not equally sensitive to low levels of
light (underexposure.) What you perceive as grain is one emulsion that is
still responding to the low light level, while the other emulsions have dropped
out.
Gene
Rob Geraghty wrote:
> I was wondering if anyone on the list could explain to me chemically how it
> is that overexposing a colour negative makes the film grain smaller? I had
> no problem with a silver based film getting coarser grain wit exposure, but
> C41 doing the opposite has me stumped. I know it *does*, but I don't
> understand how!
>
> Please email me off the list.
>
> Rob
