As Bill Burk, I've seen paper and plastic plates with "silver" patterns in the "party shelves" of stores. I'd assume that the printed patterns are not real silver and are obviously food-safe. But there are always warnings on paper and most plastic utensils not to use them on heat or in a microwave. (Obviously. )

TBH, I'm not sure about the original question or why it's asked here. Surely the packaging or a phone call to the manufacturer would provide more useful information.