I used to make the same mistake myself (as I suspect most people do) when explaining how VC papers work. Somewhere along the way (I don't remember how) we all got the notion VC paper worked by having a green-sensitive low contrast emulsion and a blue-sensitive high contrast emulsion. In fact this is not the case.
Oh wow. I'll go read it. I'm one of the "misinformed"! Might need a new thread for this!