Since the migration of TAGs takes place via the liquid fat portions, permeability increases and therefore migration induced fat bloom development is enhanced when the storage temperature is increased. The higher rate of migration during higher storage temperature agrees with results from earlier studies.
Further, results from migration data, particularly at higher storage temperature, suggest that the samples with the smallest particle size, i.e. 15 lm (d(3.2) = 3.0 lm), and thus with the largest specific surface area undergo a higher rate of oil migration from the filling compared to the samples with larger particle size, i.e. 22 and 40 lm (d(3.2) equal to 3.6 and 4.1 lm, respectively).