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MAP = Modified atmosphere packaging
EMAP = Equilibrium modified atmosphere packaging
They may defined as the enclosure of food product in gas barrier materials, in which the
gaseous environment has been changed (EMAP) or is modified continuously (MAP).
MAP correspond to a wide range of food packaging technologies (absorbers, emitters,
scavengers, desiccants, vacuum-skin packaging, high-permeability films, ) that rely on
mixtures of the atmospheric gases O
2
, CO
2
, and N
2
, in concentrations different than
those in air.
The modifications may:
slow respiration rates of fresh products
reduce microbial spoilage
delay spoilage due to enzymatic reaction