The flavor powders obtained from the spray drying and plating
processes were dry and free flowing and did not undergo caking
over six months of shelf life at room temperature in non sealed
containers. Though visually similar, the three types of flavor powders
are expected to have different physical structures. A spray dried
powder hosts the flavor molecules in cavities in the wall of the
powder particles; porous starch hosts the flavor inside the pores of
the structure but there is no complete block with respect to the
outside environment; maltodextrin, finally, does not form capsules
and does not have a porous structure, so the liquid flavor is absorbed
onto the carrier, and it is expected to be the product most susceptible
to damage from heat and to volatiles loss over time