Tristar moves Microcrisp into chains. (Tristar Products Inc.'s new food wrap) (As Seen on TV)

LAURELDALE, Pa. -- Although it is difficult to gauge total chain drug sales of individual "as seen on TV" products accurately, certain items generate an unusual amount of attention periodically as they go from the TV screen to store shelves. One of those products, say industry participants, is a unique food wrap that enables microwave ovens to bake like conventional ovens.

As with most successful "as seen on TV" products, Microcrisp (which is distributed in the United States by Tristar Products Corp.) is designed to be novel yet highly practical. According to a spokeswoman for the marketer, the patented food wrap converts microwave energy into thermal energy, so it and …