Saturation Gravity: A Conceptual and Interpretative Framework within General Relativity

This preprint presents the conceptual and interpretative foundations of Saturation Gravity, a framework in which gravitational phenomena are described in terms of a universal vacuum saturation mechanism. Saturation Gravity does not modify General Relativity. Instead, it provides an interpretative layer explaining why gravitational fields remain finite in extreme regimes. The framework introduces a formally imaginary, electric-field–like quantity whose accumulated magnitude reproduces gravitational time dilation while preserving standard relativistic structure. A universal high-field saturation scale emerges from the time-dilation formulation. Its magnitude is of the same order as the Schwinger critical field in quantum electrodynamics. This correspondence is interpreted as indicative of a common vacuum stability threshold, without implying any dynamical unification of gravitational and electromagnetic fields. The work is speculative and intended as a framework-level contribution. Detailed phenomenological applications and observational tests are reserved for future publications. The preprint is shared for discussion and critical evaluation.