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What are microwaves?
Glass & ceramic glass
Heat-resistant glass utensils are very suitable. The
cooking process can be observed from all sides. They
must not, however, contain any metal (e.g. lead crystal),
nor have a metallic overlay (e.g. gold edge, cobalt blue
finish).
Ceramics
Generally very suitable. Ceramics must be glazed, since
with unglazed ceramics moisture can get into the
ceramic. Moisture causes the material to heat up and
may make it shatter. If you are not certain whether your
utensil is suitable for the microwave, carry out the utensil
suitability test.
Porcelain
Very suitable. Ensure that the porcelain does not have a
gold or silver overlay and that it does not contain any
metal.
Plastic & paper utensils
Heat resistant plastic utensils which are suitable for use in
the microwave can be used to thaw, heat and cook food.
Follow the manufacturers recommendations.
Heat-resistant paper made for use in a microwave oven is
also suitable. Follow the manufacturers recommendations.
Kitchen paper
Can be used to absorb any moisture which occurs in short
heating methods, e.g. of bread or products in bread
crumbs. Insert the paper between the food and the
revolving plate. The surface of the food will stay crispy
and dry. Covering greasy food with kitchen paper will
catch splashes.
What are microwaves?
Like radio and television waves, microwaves are
electromagnetic waves.
Microwaves are produced by a magnetron inside the
microwave oven, and these vibrate the molecules of water
present in the food. The friction this causes produces heat,
which ensures that the food is defrosted, heated, or
cooked through.
The secret of the reduced cooking times is the fact that the
microwaves penetrate the food from every direction.
Energy is used to the full. In comparison, the energy from a
conventional hob passes from the burner through the pan
and so to the food. This method wastes a great deal of
energy.
The characteristics of microwaves.
Microwaves penetrate all non-metal objects made of glass,
china, earthenware, plastic, wood or paper. This is why the
microwaves never make these materials hot. Dishes
become hot only because the food inside them is hot.
The food absorbs the microwaves and is heated.
Microwaves cannot pass through objects made of metal
and so they are deflected. For this reason metal objects are
not normally suitable for microwave cookery. There are
exceptions where you can actually make use of the fact
that the microwaves cannot pass through metal. If you
cover food with aluminium foil at specific points while it is
defrosting or cooking, you can prevent those parts from
getting too warm, too hot, or overcooked. Please check
out the advice given in the guide.
Microwave cling film
This, or heat-resistant film, is very suitable for covering or
wrapping. Please follow the manufacturer's
recommendations.
Roasting bags
Can be used in a microwave oven. Metal clips are not
suitable for fastening them since the roasting bag foil
might melt. Fasten the roasting bag with string and
pierce it several times with a fork. Non heat-resistant
food wraps are not recommended for use in a microwave
oven.
Browning dish
A special microwave dish made from ceramic glass with a
metal alloy base, which allows food to be browned.
When using the browning dish a suitable insulator, e.g. a
porcelain plate, must be placed between the turntable
and the browning dish. Be careful to adhere exactly to
the pre-heating time given in the manufacturer's
instructions. Excessive pre-heating can damage the
turntable and the turntable stand or can trigger the
safety-device which will switch off the oven.
Metal
Generally speaking, metal should not be used, since
microwaves do not pass through metal and therefore
cannot reach the food. There are, however, exceptions:
small strips of aluminium foil may be used to cover
certain parts of the food, so that these do not thaw too
quickly or begin to cook (e.g. chicken wings). Small metal
skewers and aluminium containers (e.g. of ready- cooked
meals) can be used.
Suitable ovenware
2. AG-32D-UK ENGLISH 08/02/2006 12:58 Page 7
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