The interactions in gravity and in classical electrostatics have been revisited in (Conte, 2015, 2017) and it follows from this the taking into account of the temperatures in black body equilibrium for the neutral and charged masses thus involving two new and different writings of the relations of the resulting respective forces. This new conception of the effects of black body radiations in photonic fields which are superimposed in the structure of space-time in quantum entities EVTD2 requires that inside the entities exist material elements (concretizing the substrate of space-time) to capture and store these electromagnetic energies and they were originally named Substratum. From an electrical point of view, this Substratum corpuscle would be a dipole of very small dimensions internal to the EVTD2 and its spatial orientations would be correlated with the positive and negative pressures where the attractive and repulsive effects are generated in the new conceptions of gravity and electrostatics.