Thermocouples were set 1 inch apart from the heat source, to compare the conducted heat with the radiation heat captured by the thermal camera (Figure ). The film emissivity at thermodynamic equilibrium was obtained using the Stefan-Boltzmann law, P = εσT , where ε is the film emissivity, σ is the Stefan-Boltzmann constant, and T is the surface temperature. The integrated emissivity ε of the surface is ε = εI(TI/T) , where εI is the emissivity used for thermal imaging (0.8), TI is the infrared temperature (25°C), and T is the temperature measured with the thermocouple (56°C), resulting in ε = 0.03 for G 0 (6a). The ε was also measured for G 0 (6), ε ~0.1, however, this value is not trustworthy since annealing takes place during the measurement and both radiation and conduction heat-related temperatures are unstable.