6. Disadvantages and limitations
Though sachets and pads present many advantages over other antimicrobial packaging systems, there are a few disadvantages. Using antimicrobial sachets and pads requires an additional operation to place them in each package, and this is usually done manually, increas- ing packaging time and impairing productivity Also, many antimicrobials have undesirable odor that could nega- tively affect consumers' sensorial perception at packaging opening (Han et al., 2014; Passarinho et al., 2014). As previously discussed in this review, most of the reports on antimicrobial-emitting sachets do not take the sensory impact into account. This is not exclusive to sachets, and may be addressed by adding flavors to mask odors or by using external packaging materials that allow the permeation of the active compounds once they played their antimicrobial role