CHAPTER IX
EASY METHODS OF CANNING IN TIN
If the proper sanitary requirements are provided and instructions of the cold-pack method of canning are followed, it is entirely safe and practical to use tin cans for all kinds of fruits, vegetables and other food products. Food poisoning—commonly called ptomaine poisoning—and the effects ascribed to "salts of tin" result from improper handling and improper preparation of the product before packing, or from allowing the product to stand in the tin after it has been opened. The raw food products used for canning in tin must be in sound condition, just as they must be if put into glass containers.
It is true that canned foods may be rendered unfit for use by improper handling of the product before packing and that decomposition may occur after canning, owing to insufficient processing, improper sealing or the use of leaky containers. This condition, however, is no more likely to be encountered in foods put up in tin than in products canned in other types of containers. You run no more danger of poison from your own tin-canned products than from tin-canned food bought at the store. Most canned foods if in a spoiled condition readily show this condition by the swelling of the can or by odor or taste. Canned foods showing such evidences of decomposition should not be used.
Certain foods which are high in protein, such as meats, peas, beans and fish products, may undergo decomposition without making this condition obvious to the senses. It is essential, therefore, that the greatest care be taken to subject such products to proper preparation and ample processing. It should be remembered that canned foods, after opening the containers, should be treated as perishable products and should be handled with the same precautions that are applied when fresh products are being used.
ADVANTAGES OF CANS
Many housewives ask, "Why can in tin when we have always used glass jars?" There are many advantages in canning in tin which we can well consider. There is no breakage as in glass; you can handle the tin cans as carelessly as you choose and you will not hear a snap or crack indicating a lost jar. Furthermore, tin cans are easier to handle not only in canning but in storing.
The expense each year of new tin covers or new tin cans is no more than the purchase of new rubbers and the replacement of broken glass jars. Furthermore, one big advantage of tin over glass is that tin cans can be cooled quickly by plunging them into cold water immediately upon removal from the canner, and thus the cooking is stopped at the proper moment. The product is consequently better in form and flavor than when the cooking is prolonged, as it must be in glass jars. Many women like the large openings of cans because they can make better packs than when using narrow-necked jars.
If you do not care to bother with the soldering you can purchase a safe and simple device that will do the work for you. This device is called a tin-can sealer. With a sealer no soldering is necessary. Even an inexperienced person, by following directions carefully, can seal a can as well as an experienced one. The sealed cans look exactly like those purchased at the store. Two or three cans a minute can be sealed with this device.