If the thermometer is used, all that need be done is to insert it into the candy and allow it to remain there until the temperature is registered. In case it does not reach the right temperature the first time, keep the mixture boiling until it registers the temperature that is decided on as the correct one.
59. To test the mixture by the water method, allow it to boil almost long enough to be done, and then try it at close intervals when it is nearing the end of the boiling. Dip a little of the sirup into a spoon and drop it slowly into a cup containing a little water. Not much sirup is needed for the test, a few drops being sufficient. Gather the drops together with the tips of the fingers and judge from the ball that forms whether the candy has boiled sufficiently or not. If the ball is not of the right consistency, boil the candy a little longer, and test again. Be sure, however, to get fresh water for each test. When the candy is nearing the final test, and it is thought that the mixture has boiled enough, remove the pan from the heat while the test is being made so that the boiling will not be continued too long.
60. To assist in making the tests for candy properly, Table I is given. This table shows both the water test and the corresponding temperature test for the representative variety of the leading classes of candies. In each one of these classes there are, of course, a number of varieties which may cause a slight variation in some of the tests, but on the whole these tests are uniform and can be relied on for practically all candies.
TABLE I
TESTS FOR REPRESENTATIVE CLASSES OF CANDY
| Classes | Water Test | Temperature Test Degrees Fahrenheit |
| Center Cream | Soft ball | 234 to 236 |
| Fudge | Firm ball | 238 to 240 |
| Caramels | Hard ball | 246 to 248 |
| Taffies | Brittle ball | 256 to 260 |
When candy is cooked long enough to form a soft ball, it can just be gathered together and held in the fingers. If it is held for any length of time, the warmth of the fingers softens it greatly and causes it to lose its form. This test is used for candies, such as soft-center cream. It will be found that when candy boiled to this degree is finished, it can scarcely be handled.
The firm ball is the stage just following the soft ball. It will keep its shape when held in the fingers for some time. This is the test for fudge, bonbon creams, and similar candies that are creamed and are expected to be hard and dry enough to handle when they are finished.
To form a hard ball, candy must be cooked longer than for the firm ball. At this stage, the ball that is formed may be rolled in the finger tips. It is not so hard, however, that an impression cannot be made in it with the fingers. It is the test for caramels, soft butter scotch, sea foam, and many other candies.
A brittle ball is the result of any temperature beyond 256 degrees up to the point where the sugar would begin to burn. It is hard enough to make a sound when struck against the side of the cup or to crack when an attempt is made to break it. This is the test that is made for taffy and other hard candies.