6
ITEM
MICROWAVE
COMMENTS
Yes for
Small strips of foil can be molded around thin parts of
Aluminum Foil
Shielding
meat or poultry to prevent overcooking. Arcing can occur
only
if foil is too close to oven wall 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
Labelled
Yes
microwave heating. Some dinnerware may state on the
“Microwave-Safe”
back of the dish, “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
Metal
Yes
2 cm (
3
/
4
-in) high. Place foil tray in centre of oven. Leave at
least 2.5 cm (1-in) space between foil tray and oven walls.
Microwave-safe
Yes
Heat only 1 foil tray in the oven at a time. For containers more
than 2 cm (
3
/
4
-inch) 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
use caution
jars are 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 cm (
1
/
2
-in) 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 labeled, "Suitable for Microwave Heating." Check
Cookware manufacturers’ directions for recommended uses.
Reheat & Storage
Yes,
Some microwave-safe plastic dishes are not suitable for
use caution
cooking foods 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
use caution
to bring foods to a low serving temperature.
Use to cover food during cooking to retain moisture and
Plastic Wrap
Yes
prevent 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.
Conventional
No
Not suitable 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.
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.
Cookware and Utensil Guide