invisible ink. Effective trick and its solution

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EFFECTIVE FOCUSES AND THEIR CLUES
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invisible ink. Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

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Focus Description:

It's easy to make your own ink that becomes invisible when dry!

Focus secret:

One easy invisible ink recipe is potato juice. To prepare it, you need to cut off a large potato on both sides, put it on the table and dig a hole in it in the middle. In the hole that has formed, squeeze the juice from the individual parts of the potato. You can write or draw with a match, wetting it in an inkwell. The sheet will become invisible as soon as the ink dries. And in order to read the message, you need to hold it over the fire or put it on the battery.

Lemon, onion juice or Coca-Cola will also work for this activity.

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Random news from the Archive

Solar oil from greenery 28.09.2005

Someday the source of diesel fuel will not be oil wells, but plants, an American scientist believes.

James Damsik and his colleagues from the University of Wisconsin-Madison propose to rely on carbohydrates, which make up 75% of the dry weight of plants, for the manufacture of biofuels, but not to turn them into ethanol, but to go the other way: directly convert vegetable carbohydrates into long hydrocarbon chains - they are and are diesel fuel.

Because oil and water are immiscible, these hydrocarbons will float on the surface of the reactor where they can be easily scooped out. In order to turn the short and sometimes closed carbon skeletons of plant carbohydrates into long molecules of diesel fuel, scientists conducted several reactions involving catalysts and hydrogen, and H2 is supposed to be extracted again from plants.

The experiment has so far been delivered in its pure form - chemists used carbohydrates themselves. Plants, apparently, will have to be pre-treated.

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