Question

Which of the following is used as C enamel on cans?

(a) ZnO

(b) PbS

(c) NaOH

(d) H2S

This question was posed to me during an internship interview.

This key question is from Food Packaging Materials in chapter Food Packaging Materials, Packaging Standards and Regulation Laws of Food Packaging Technology

Answer 1

The correct option is (a) ZnO

To elaborate: ZnO (Zinc Oxide) is a C-enamel used on cans. C-enamels is used for coating the internal surface of low acid, high sulphur foods to prevent discoloration or erosion.