Which of the following is NOT a suitable material for food contact surfaces?

The option indicating that a material should be dark in color to hide dirt suggests a misunderstanding of proper food safety practices. While it is important for a material to not visibly show dirt for aesthetic reasons, the primary consideration for food contact surfaces should be their functionality, safety, and cleanliness, rather than their ability to camouflage dirt.

Materials for food contact surfaces must prioritize safety and durability, meaning they should not harbor bacteria and should withstand regular cleaning and usage. Furthermore, surfaces should be resistant to chipping and cracking to prevent contamination from particles breaking off and entering food. Lastly, smooth surfaces that are easily cleanable help ensure that any contaminants can be effectively removed, reducing the risk of foodborne illnesses. In sum, while color might play a role in perception or maintenance, it does not meet the established criteria for food safety and compliance.