Steel hardening. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Steel hardening. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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As you know, steel can be given by a special hardening so hard that it will cut through glass like a diamond. But not everyone knows that there is a very simple way to give steel such hardness.

An awl, knife blade or other tool is heated to white and immediately immersed in ordinary sealing wax for one second. This operation is repeated continuously, each time choosing a fresh place in the sealing wax for immersion, until the steel cools down and no longer enters the sealing wax. Then the hardening process is considered complete.

It remains to remove the adhering particles of sealing wax. When using a point or blade made of steel hardened in this way, it is recommended to moisten them with turpentine each time.

Author: Korolev V.A.

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Deadly danger of apples 26.09.2016

Apples are often called the "fruit of health" because they contain many vitamins and antioxidants. However, it is impossible to eat a whole apple, with a core and seeds.

There is a proverb in English: “An apple a day keeps the doctor away”: it has been established that eating apples is useful for the prevention of many diseases, including cancer. Although apples do not contain as much vitamin C compared to other fruits and vegetables, they are rich in antioxidants. Apple fiber stimulates intestinal motility, has a positive effect on heart function and lowers cholesterol levels.

Some nutritionists even advise eating whole apples, but this is an erroneous opinion: apple seeds contain a deadly compound - mandelic acid nitrile gentibioside C20H27NO11, or amygdalin. It is also present in the pits of cherries, almonds, peaches, and many plum plants. The specific gravity of amygdalin in different fruits is different: if for almonds and peaches it is about 2,5-3%, then for apricot this figure is at the level of 1,8%, and for apples - 0,6%.
Scientists remind of the danger lurking inside the fruit. In mild cases, amygdalin poisoning is manifested by headache and nausea; in severe cases, cyanosis, convulsions, loss of consciousness are observed; even death is possible.

In New Zealand, cases of amygdalin poisoning have been reported after eating 30–60 apricot kernels. The exact number of whole eaten apples that can be harmful to health has not been calculated, but one should not forget that their bones, albeit in low concentrations, contain poison.

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