EN 9
BEFORE USE
Cookware
Microwave-
Safe
Comments
Aluminium foil 37 Can be used in small quantities to protect areas
against overcooking. Arcing can occur if the foil
is too close to the oven wall or if too much foil is
used.
China and
earthenware
3
Porcelain, pottery, earthenware and bone china
are usually suitable, unless decorated with a metal
trim.
Disposable polyester
cardboard dishes
3
Some frozen foods are packaged in these dishes.
Fast food packaging
•
Polystyrene
cups containers
•
Paper bags or
newspaper
•
Recycled paper
or metal trims
3
7
7
Can be used to warm food. Overheating may
cause the polystyrene to melt.
May catch fire.
May cause arcing.
Glassware
•
Oven-to-table
ware
•
Fine glassware
•
Glass jars
3
Can be used, unless decorated with a metal trim.
Can be used to warm foods or liquids. Delicate
glass may break or crack if heated suddenly.
Must remove the lid. Suitable for warming only.
Metal
7
May cause arcing or fire.
Paper
•
Plates, cups,
Kitchen paper
•
Recycled paper
3
7
For short cooking times and warming. Also to
absorb excess moisture.
May cause arcing.
Plastic
3
Particularly if heat-resistant thermoplastic. Some
other plastics may warp or discolour at high
temperatures. Do not use Melamine plastic.
Can be used to retain moisture. Should not touch
the food. Take care when removing the film as
hot steam will escape. Only if boilable or oven-
proof. Should not be airtight. Prick with a fork, if
necessary.
3 : Recommended
37 : Use with caution
7 : Unsafe
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