The central claim of the paper, derived (not observed): a black hole formed by gravitational collapse settles into a state that emits every particle species thermally at T = kappa/2pi. For a Schwarzschild hole kappa = 1/4M, so T ∝ 1/M: small holes are hot and evaporate fast. The paper estimates the full evaporation time as ~10^-28 M^3 s (M in grams), and that any primordial black hole of initial mass below ~10^15 g would have evaporated by now. Emission of massive species switches on once T exceeds their rest mass; rotating/charged holes emit with omega replaced by omega - mOmega - ePhi, shedding angular momentum and charge preferentially. This derivation is the entire theoretical content of “Premise A” of the LHC safety case; it remains experimentally unconfirmed.