Recipes of invisible sympathetic ink made of lemon juice, milk, aspirin, soda, washing powder, cobalt, with copper sulfate? How to make invisible ink visible with an iron and lamp?

Recipes for cooking invisible ink. Ways of their manifestation.

The secretary appeared in the first century BC. These were the secret notes of the pharaohs. Since then, a lot has changed in the secretary. They began to use not only plant juice and milk for this, but also specially designed chemical ink. Basically, this type of secret letter is aimed at diplomatic negotiations or secret correspondence.

What are sympathetic ink, what does the ink make invisible?

Sympathetic ink - special compositions, which, when applied to paper under ordinary conditions, become invisible. Under certain conditions, records appear. This can be either reagent processing and temperature changes. Often such ink manifest when heated. Initially, this method was used for secret correspondence. Now this is a kind of stenography method.

Is it possible to make sympathetic ink at home?

Such ink is quite simple to make at home. Such experiments will be interesting to children. First of all, you need to find out what you are going to make ink. There are many components and options.

Ink options:

• Milk
• Soda
• Cobalt
• Washing powder
• Lemon juice
• Aspirin

Recipe for invisible ink of aspirin

These ink are manifested with salts that contain iron. It can be a birter salt or iron sulfate. The recipe for making ink is simple.

Instructions:

• Dissolve the aspirin tablet in 20 ml inputs. It is better to turn it into a powder
• After that, moisten a brush or toothpick in the liquid and write a letter
• Let it dry completely, you can put in an envelope

Recipe for invisible ink of lemon juice

Oddly enough, invisible ink can be made from lemon juice.

Instructions:

• Squeeze a little lemon juice into the bowl and enter 5 drops of water
• After that, lower the cotton wool into the juice and write a letter
• Let the juice dry completely. Keep away from sunlight
• To manifest ink, it is necessary to heat them a little. This can be done with an iron or light bulb

Recipe for invisible incense in washing powder

The inscriptions made in this way can be viewed using a UV world. A luminescent lamp or a flashlight is suitable.

Instructions:

• Dissolve 10 g of washing powder in 100 ml of water. Mix the ingredients very carefully
• It is necessary that the grain of powder dissolves to dissolve
• Moisten the brush in the solution and apply the inscription on the paper
• Dry without using the sun

Recipe for invisible ink according to a Chinese recipe

These inks were used by the ancient Chinese for applying inscriptions.

Instructions:

• Boil rice in water. You can cook porridge from it
• After that, moisten the brush in a viscous decoction and apply the inscription
• Let the letter dry in the shade
• To manifest ink, use iodine
• In places of inscriptions, he will turn blue, as the rice contains starch

Recipe for invisible ink of cobalt

This is the best recipe, since the inscriptions after manifestation become bright and saturated.

Instructions:

• Dissolve a pinch of cobalt chloride in 20 ml of water
• Stir the solution thoroughly and moisten the brush in it
• Apply the inscription on the sheet and let it dry completely
• In order to show the inscription, it is necessary to heat the letter using an iron or light bulb

Recipe for invisible ink of milk

A simple method from a product that is available in almost every refrigerator.

Instructions:

• Pour a little milk into the glass and immerse the brush into it
• Apply the inscription on the paper and let it dry
• Do not dry under direct sunlight
• To manifest, you need to heat a letter

Recipe for invisible ink of soda

A concentrated solution is used to apply beech.

Instructions:

• Boil water and in 100 ml of boiling water dissolve 10 g of sodium bicarbonate
• It is necessary to achieve complete dissolution of crystals
• Dip the wand into a cooled solution and write secret information
• Dry the paper in the shade. To manifest, heat the letter

Recipe for invisible ink with iodine

These are special ink, since they are first visible, and after 1-2 days they completely disappear.

Instructions:

• In half a spoonful of dextrin, we introduce 30 ml of iodine solution on alcohol, and pour through the gauze folded several times
• Filtered "ink" blue now write information
• A day later, thanks to the volatility of iodine, the text will completely and irrevocably disappear
• To make the inscription again visible, go on paper by a swab moistened in a solution of iodine

Recipe for invisible ink with copper sulfate

This method was used in the Middle Ages. Also, the method was popular among inquisitors.

Instructions:

• Add a pinch of salt of copper sulfate in 30 ml of water
• Get the complete dissolution of the crystals
• Moisten the brush in the mixture and apply the inscription
• Let the solution dry in a shady room
• To manifest the inscription, hold the leaf over ammonia alcohol
• Due to the formation of ammonia salt, the inscription will become blue

How to make invisible ink visible with an iron and lamp?

Milk, cobalt chloride and lemon juice reacts to heating.

Instructions:

• Put the letter on a clean sheet and cover with another white sheet
• Using an iron, heat the sheet
• You can show a letter using a light bulb
• Just hold a sheet of paper above the lamp or table lamp

How to make a pen with invisible ink? How to fill the handle with invisible ink?

To do this, you can use a ballpoint pen or feathers. With a feathery, everything is simple. It is necessary to pour one of the secret solutions into the ink compartment and safely proceed to write.

Instructions for making a handle with invisible ink:

• Take a ballpoint pen with a paste in which ink ended
• Rinse thoroughly with alcohol, having previously removed the metal rod
• It is necessary to achieve complete evaporation of alcohol and the purity of the metal nozzle
• Install the nozzle in place, and pour invisible ink into the tube with a syringe with a syringe
• You can start writing a letter

As you can see, with the help of simple manipulations, invisible ink can be made. This will amuse your children.

Video: Invisible ink