GE SpacemakerXL JVM1533 Owner's Manual page 29

Microwave terms.
Term Definition
Arcing is the microwave term for sparks in the oven. Arcing is
Arcing
caused by:
Covers hold in moisture, allow for more even heating and reduce
Covering
cooking time. Venting plastic wrap or covering with wax paper
allows excess steam to escape.
In a regular oven, you shield chicken breasts or baked foods to
Shielding
prevent over-browning. When microwaving, you use small strips
of foil to shield thin parts, such as the tips of wings and legs on
poultry, which would cook before larger parts.
When you cook with regular ovens, foods such as roasts or cakes
Standing Time
are allowed to stand to finish cooking or to set. Standing time is
especially important in microwave cooking. Note that a
microwaved cake is not placed on a cooling rack.
After covering a dish with plastic wrap, you vent the plastic wrap
Venting
by turning back one corner so excess steam can escape.
the metal shelf not installed correctly so that it touches
the microwave wall.
metal or foil touching the side of the oven.
foil that is not molded to food (upturned edges act like
antennas).
metal such as twist-ties, poultry pins, gold-rimmed dishes.
recycled paper towels containing small metal pieces.
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