Q.106
Given below are two statements
Statement (I) : Lacquering of metal cans is done to prevent various kinds of corrosion and discolouration during packaging of
meat.
Statement (II) : Usually only outer coating of can with lacquer is done to protect it
In light of the above statements, choose the most appropriate answer from the options given below.
EXPLANATION
Food Packaging Materials: Plastics, Laminates, Retort Pouches, Cans and Glass Containers
- Statement (I) is Correct: Lacquering (enameling) of tinplate cans with food-grade epoxy-phenolic, oleoresinous, or vinyl coatings is essential to prevent internal can corrosion, acid etching, and "sulfur staining" (formation of purple-black ferrous sulfide, $FeS$, when sulfur amino acids in meat breakdown during autoclaving).
- Statement (II) is Incorrect: Lacquering is primarily applied on the inside (internal coating) of the can in direct contact with meat to prevent electrochemical reactions between food and metal; exterior coating is for decorative labeling and atmospheric rust prevention.
Explanation not matching this question?
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