Indentation patterns in microwave packaging materials can enhance the
baking and browning effects of the microwave packaging materials on food.
The indentation patterns can 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 can 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 can 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.