Emofin is not a split developer of the kind meant in the original post but a two-bath developer, bath 1 of which contains the developing agent, bath 2 containing the activator. The process works strongly compensating because when you soak the film in bath 1, it absorbs a certain amount of developing agent. Bath 2 activates this. In the dense areas of the negative, the developing agent is consumed much faster than in the thin areas. Therefore, development stops sooner in the dense areas.(posted 8595 days ago)I guess the problem with the idea is that you don't usually develop negatives by inspection, and that - as mentioned above - you have got one shot per negative. If it doesn't work out, you've blown it.