USE
Cookware
Aluminium foil
Porcelain and
earthenware
Disposable crockery
made from polyester
or cardboard
Fast food packaging
Polystyrene cups
•
•
Paper bags or
newspaper
•
Recycled paper
or metal edges
Glassware
•
Oven dishes
Fine glassware
•
•
Glass jars
Metal
Paper
•
Plates, cups,
kitchen paper
•
Recycled paper
Plastic
: Recommended
3
: Careful
37
: Unsafe
7
EN 28
Microwave safe
Remarks
Can be used in small quantities to prevent certain parts
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of the dish from overcooking. Arcing can occur if the foil is
too close to the oven wall or if too much foil is used.
Porcelain, earthenware, glazed earthenware and ivory
3
porcelain are usually suitable, unless they have a metal
edge.
Frozen meals are sometimes packaged in disposable
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tableware.
Can be used to warm up dishes.
3
Polystyrene can melt if it overheats.
Can catch fire.
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Can cause arcing.
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Can be used, unless it has a metal edge.
3
Can be used to warm up dishes or liquids. Thin glass can
break or shatter with sudden heating.
The lid must be removed. Only suitable for warming.
Can cause arcing or fire.
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For short cooking times and warming. For absorbing
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excess moisture.
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Can cause arcing.
Especially heat-resistant thermoplastic material.
3
Other types of plastic can warp or discolour at high
temperatures. Do not use melamine plastic.
Can be used to hold moisture.
May not touch the food.
Be careful when you remove the film; hot steam can escape.
Only if boil-proof or ovenproof. Must not be airtight.
If necessary, prick it with a fork.