Which type of materials must be used for product contact surfaces?

• A. Ordinary plastics unsuitable for food contact.
• B. Non-food-grade materials allowed if cleaned.
• C. Recycled metal.
• D. Food-grade materials.

Answer: (D)

Materials that touch the product must be food-grade. These materials are certified as safe for contact with edible products, meaning they won’t leach harmful substances, will not impart odors or flavors, and can be cleaned and sanitized effectively without degrading. They are typically non-porous, durable, and resistant to the cleaners and processes used in production, reducing the risk of contamination.

Using non-food-grade or untested materials can still pose hazards even after cleaning, because some substances may migrate into the product or harbor microbes in tiny crevices. Ordinary plastics not approved for food contact can release contaminants; cleaning non-food-grade materials doesn’t guarantee safety. Recycled metals may carry unknown impurities or be prone to corrosion, which can also contaminate products. Therefore, only food-grade materials meet the necessary safety and hygiene standards for product contact surfaces.