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CONTAINER TEST
TO TEST A CONTAINER FOR SAFE MICROWAVE OVEN USE: Fill a 1-cup glass measure with cool water and place it in
the microwave oven alongside the empty container to be tested; heat one (1) minute at P10 (HIGH). If the container is
microwave oven-safe (transparent to microwave energy), the container should remain comfortably cool, the water in glass
measure should be hot. If the container is hot, it has absorbed some microwave energy and should NOT be used. This test
cannot be used for plastic containers.
ITEM MICROWAVE COMMENTS
Yes for Small strips of foil can be molded around thin parts of meat or poultry
Aluminum Foil Shielding to prevent overcooking. Arcing can occur if foil is too close to oven wall
only or if too much foil is used.
Browning Dish Yes
Browning dishes are designed for microwave cooking only. Check
browning dish information for instructions and heating chart. Do not
preheat for more than 6 minutes.
Brown paper bags No May cause a fire in the oven.
Dinnerware Check manufacturers' use and care directions for use in microwave
Labelled Yes heating. Some dinnerware may state on the back of the dish,
“Microwave-Safe”“Oven-Microwave Safe”.
Other Dinnerware ? Use CONTAINER TEST below.
Disposable polyester
Yes
Some frozen foods are packaged in these dishes. Can be
Paperboard Dishes purchased in grocery stores.
Fast Food Carton
No Metal handle may cause arcing
.
with Metal Handle
Frozen Dinner Tray Frozen dinners may be heated in foil tray, if tray is less than
3
/4-in.
Metal Yes (2 cm) high. Place foil tray in centre of oven. Leave at least 1-in.
(2.5 cm) space between foil tray and oven walls.
Microwave-safe Yes Heat only 1 foil tray in the oven at time. For containers more than
3
/4-inch (2 cm) deep,remove food and place in a similar size
microwave-safe container.
Glass Jars
Yes, Remove lid. Heat food until just warm, not HOT. Most glass jars are
use caution not heat resistant. Do not use for cooking.
Glassware
Heat Resistant Oven
Yes
Ideal for microwave cooking and browning.
Glassware & Ceramics (See CONTAINER TEST below)
Metal Bakeware No Not recommended for use in microwave ovens.
Metal Twist Ties No May cause arcing which could cause a fire in the oven.
Follow manufacturers' directions. Close bag with the nylon tie
Oven Cooking Bag Yes
provided, a strip cut from the end of the bag, or a piece of cotton string.
Do not close with metal twist tie. Make six
1
/2-in. (1 cm) slits near the
closure.
Paper Plates & Cups Yes
Use to warm cooked foods, and to cook foods that require short
cooking times such as hot dogs.
Paper Towels & Napkins Yes Use to warm rolls and sandwiches.
Parchment Paper Yes
Use as a cover to prevent spattering. Safe for use in microwave,
microwave/convection and conventional ovens.
Plastic
Microwave-Safe Yes Should be labelled, "Suitable for Microwave Heating." Check
Cookware manufacturers’ directions for recommended uses.
Reheat & Storage Yes, Some microwave-safe plastic dishes are not suitable for cooking foods
use caution with high fat or sugar content. The heat from hot food may cause the
plastic to warp.
Melamine No This material absorbs microwave energy. Dishes get HOT!
Plastic Foam Cups Yes
Plastic foam will melt if foods reach a high temperature. Use to bring
foods to a low serving temperature.
Use to cover food during cooking to retain moisture and prevent
Plastic Wrap Yes spattering. Should be labelled “Suitable for Microwave Heating”.
Check package directions.
Straw, Wicker, Wood Yes
Use only for short term reheating and to bring
food to a low serving temperature.
Thermometers
Microwave-safe, only Yes Use only microwave-safe meat and candy thermometers. Not suitable
Conventional No
for use in microwave oven, will cause sparks and get hot.
Wax paper Yes Use as a cover to prevent spattering and to retain moisture.
Cookware and Utensil Guide
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