Items That Cannot Be Considered Kosher During Passover

On Passover, there is a series of items that cannot be used as Kosher items. They include the following:

All plates or bowls made of ceramic, bone china or various clays cannot be considered Kosher items, because items made of these materials are permeable. (Most porcelain is composed of various clays.)

Any plastic product also cannot be considered Kosher, because it absorbs trace particles of food. (Ashkenazic custom only, but not all rabbis agree with this position and statement.)

During Passover, baking pans also cannot be used as Kosher items.