Metals and their alloys, which are mixtures other elements, are used in food packaging (e.g. cans and lids) processing (e.g. conveyor belts and other machinery), and in food service ware (e.g. plates, forks, etc.) [1]. Metal products may be preferred for their recyclability (e.g. aluminum). They are preferred in machinery for their durability, heat and chemical resistance, and ease of cleaning (e.g. stainless steel). Metal-based food contact surfaces may be treated with coatings to prevent reactions between food and the metal or to improve non-stick or other surface properties, but coatings may contain chemicals of concern such as bisphenols or PFAS [2].

Preferred metals and alloys will have some or all of the following characteristics:

• They are produced from recyclable feedstocks.
• They avoid layering metals with other materials. Paper and plastic packaging containing a thin film of metal coating cannot be recycled [1]
• They avoid liners or coatings with intentionally added bisphenols, biocidal films, and PFAS. Refer to our information on coatings and varnishes for more information.