Indentation patterns are scored in microwave packaging materials to enhance
the baking and browning effects of the microwave packaging materials on food products.
The indentation patterns provide venting to either channel moisture from one area
of the food product to another, trap moisture in a certain area to prevent it from
escaping, or channel the moisture completely away from the food product. The indentation
patterns cause the microwave packaging material underneath a food product to be
slightly elevated above the cooking platform in the base of a microwave. The indentation
patterns lessen the heat sinking effect of the cooking platform by providing an
air gap for insulation. Elevating the base of the microwave packaging material
further allows more incident microwave radiation to propagate underneath the microwave
packaging material to be absorbed by the food product or by microwave interactive
materials in the microwave packaging material that augment the heating process.
