Calorimetry responses in glaciation [3,131]. (A) A primary exo appears after the glass transition on heating, resembling glaciation (red curve); upon heating-quenching by the end of the primary exo, the MGG shows increased glass transition temperature and no changes in crystallization exothermic peaks. (B) Reversal of glaciation is demonstrated by firstly heating the MG up to the end of the primary exo (green curve), quenching and reheating the MGG up to the end of the endothermic peak (red curve). Further quenching and reheating show collapse in the heating curve (blue curve), indicating that MGG is fully transformed back to MG. (C) Reversible specific-heat (C_{p, rev.}) change reveals two glass transitions and two separated glass transition temperatures (T_g1 and T_g2), indicating nucleation-growth kinetics. (D) C_{p, rev.} change reveals two glass transitions yet one glass transition temperature (T_gs) shifting continuously with the annealing time, implying spinodal-decomposition kinetics. (E) For NG-type kinetics, two endothermic peaks emerge simultaneously in annealing. (F) For SD-type kinetics, the second endothermic peak appears only after the intensity of the first endothermic peak is saturated.