The special equipment
needed for each of the canning methods, however, is not taken up until
the method is considered. In giving this general equipment, mention is
made of some utensils that are convenient but not absolutely necessary.
Any unnecessary, but convenient, part of a canning equipment should
therefore be chosen with a view to its labor-saving qualities and its
expense. A device that will make the keeping of canned foods more
certain and prevent loss may be a valuable purchase; still, that which
makes for greater convenience, but not absolute saving, need not be
considered a necessity.
17. VESSELS FOR CANNING.--The pots, kettles, and pans in ordinary use in
the kitchen for cooking purposes are usually satisfactory for the
canning of foods. Those made of tin or iron, however, are not so good as
enameled ones or those made of other metals, such as aluminum.
Especially is this true of utensils used for the canning of acid fruits
or vegetables, because, if such food remains in contact with tin or iron
for more than a few minutes, the acid will corrode the surface
sufficiently to give the food a bad or metallic taste.
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