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Suitable Containers for Microwave Ovens
Microwaves
– are reflected by metal,
– pass through glass, porcelain, plastic and card,
– and are absorbed by food.
Material and shape
The material and shape of containers used affect cooking results and times. Heat distribution is more even
in round and oval shaped flat containers than in rectangular containers, providing better results.
Metal
Metal containers, aluminium foil and metal cutlery, or china with metallic decoration, such as gold rims
or cobalt blue must not be used in an oven being used in microwave mode. The metal reflects the
microwaves, hindering the cooking process.
Exceptions:
– Ready-meals in aluminium foil dishes.
These can be defrosted and reheated in the microwave oven, if recommended by the manufacturer.
However, as food is only heated from the top, it is better to remove the food from the aluminium foil
container and transfer it to a dish suitable for a microwave oven. The heat distribution will be more even.
If sparks and arcing occur when using an aluminium container, stop and transfer the food to a microwave
safe container.
– Pieces of aluminium foil
For even defrosting and to avoid overcooking unevenly shaped cuts of meat, poultry or fish, small pieces
of aluminium foil may be used to mask wingtips or other thin parts for the last few minutes of the
programme. Make sure that the aluminium foil is at least 2 cm from the oven walls at all times. It must not
touch the walls.
– Metal meat skewers or clamps.
These should only be used if they are very small in comparison to the size of the cut of meat.
– Glassware
Heat-resistant glass or ceramic glass are ideal for use in the microwave oven. Crystal glass contains lead
which could cause the glass to crack. Glass dishes with a milled rim are also subject to this risk. Both are
unsuitable.
Porcelain
Porcelain is a suitable material. Do not use porcelain with gold or silver edging or items with hollow knobs
or handles, as insufficient ventilation may cause pressure.
Earthenware
Decorated earthenware is only suitable if the decoration is beneath an all-over glaze. Earthenware can get
very hot, and may crack.
Glazes and colours
Some glazes and colours contain metals which make them unsuitable for use in a microwave oven.
12 ILVE Operating Manual
IV600BIM Microwave Manual 2014 V1.indd 12 22/05/2014 5:45 pm
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