I have been reading the Edge of Darkness by Barry Thornton and I really like the idea of two bath developing but I dont quite understand it.

How exactly do you do this? I am a little confused on the chemicals that is needed. But I like that fact that it really holds backthe highlihght and when shooting 120 or 35 it gives you better development.

One day I will switch to 4x5 but for now I need to find the best way to develop my negatives and it seems the two bath is the way to go but I need help in understanding it.