Ultra-stable thin glass films are obtained when they are deposited at a temperature T-d below the glass transition temperature T-g. An enthalpy excess Delta epsilon x Delta H-m is frozen during deposition inducing an isothermal liquid-glass transition temperature T-sg equal to T-d and a liquid-to-liquid transition temperature T-gf above Tg depending on As. The enthalpy excess, the ultra-stable glass enthalpy saving, and the optimum deposition temperature Tsg leading to the maximum density, are predicted for ethylbenzene, knowing only the molar melting heat Delta H-m of crystals, their melting temperature T-m, T-g, and the specific heat jump at T-g. (C) 2015 Elsevier B.V. All rights reserved.