Which of the following does NOT necessarily pertain to food-grade lubricants?

Food-grade lubricants are engineered to ensure safety and compliance in environments where they may come into contact with food products. The attributes associated with such lubricants primarily focus on safety, performance, and regulatory compliance.

The necessity for food-grade lubricants to be odorless relates to preventing any alteration in the taste or smell of food. A neutral odor ensures that the lubricant does not negatively affect the sensory properties of food products.

Biodegradability is also an important characteristic due to the increasing emphasis on environmentally friendly practices. Lubricants that are biodegradable help minimize environmental impact should there be any spills or leaks in food processing environments.

Having a high flash point is crucial for food-grade lubricants since it indicates the temperature at which the lubricant can ignite. A high flash point helps reduce the risk of fire hazards, especially in operations involving heat.

The visibility aspect, however, while beneficial for monitoring purposes, is not a strict requirement for food-grade lubricants. A bright color can indeed aid in identifying lubricant leaks or spills quickly, but it is not essential to the lubricant's classification as food-grade. Thus, the statement pertaining to bright color for visibility does not necessarily pertain to the core requirements of food-grade lubricants.