The present invention relates to a method for developing an exposed high contrast photographic silver halide material, said photographic material comprising a support bearing at least one silver halide emulsion layer, containing at least one hydrazide nucleating agent. The apparatus includes probe logic hardware that monitors the program’s behavior in executing memory reference instructions. At least one of the serpentine bands has a spline extending therefrom toward a serpentine band adjacent thereto. The first connector is connectable to the liquid container, and the second connector is accessible from outside the pressure container.