Infrared signals recorded during the heating process (1 °C/min from 90 °C to 189 °C) of a sample corresponding to erythritol–dulcitol system: (a) droplet of pure erythritol (left-hand side) and (b) droplet with composition equal to 54 mol% of dulcitol (right-hand side). The droplets are ∼2 mm in diameter. The number of pixels per droplet (number of curves in the graphs) is 79.