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.
Thus, combining the surface topology results with the migration results indicate that all results support each other, i.e. that the samples containing the smallest non-fat particles show the highest migration rate and the highest rate of fat bloom development.
These findings can be supported by earlier studies, where produced CB bars with sand particles of varied size. They could demonstrate that the bars made with the smallest sand particle fraction (_5 lm) showed the highest rate of oil migration and the biggest whiteness index change.