the embodiments disclose means to inhibit the growth and migration of bacteria , mildew and fungus by applying various coatings which contain an inorganic anti - microbial agent onto metal , glass , and plastic substrates . the substrates are used in the manufacture of components for the interior of refrigerators and freezers , which include wire and glass shelving , plastic crisper baskets and other articles within the food storage area . the coatings include the inorganic anti - microbial agent combinet with a matrix resin which are applied by electrostatic powder coating , roller coating , or robotic spraying , and then cured .