All About HEALTH > Homemade production of bleach disinfectant (Javel Water / Eau de Javel) : english, français, español, italiano

How to make your own bleach / javel water (english, français, español, italiano)



Author's page : Homemade Bleach Disinfectant (english, français, español,italiano)
Homemade production of bleach disinfectant

Download the full page in pdf    HERE (right click, Save Link As)

Otherwise known as chlorine, bleach is today one of the best know disinfectants and is commonly used to treat drinking water in european water main production.

The proposed method makes use of basic materials that can be found easily, anywhere.


Kills off effectively, in just a few minutes, the bacillus of Tetanus, Cholera, Typhus, Carbuncle, Hepatitis, Entero virus, Streptococcus, Staphylococcus, etc ...


    to disinfect drinking water
    to disinfect vegetables and kitchen ware (plates, pots and pans, cutlery)
    to sterilize feeding bottle
    to sterilize clothes, sheets, walls, floors (homes and hospitals)
    to disinfect cuts, sores, etc.
    to disinfect surgical instruments
    to disinfect animals, stable walls, etc
    to disinfect excrements

How to produce bleach at home

Materials :

    - a tall plastic, 1.5 bottle with screw top
    - a cylindrical charcoal stick taken from a large electrical torch (N.B. batteries with a plastic ring contain a carbon electrode while other batteries have a metal ring, and so being alkaline, they have a metal electrode)
    - a wax candle or a tube of silicone (to seal the cap)
    - a container
    - kitchen salt (non iodized) or for animal feed
    - water (preferably rain water or filtered/distilled water)
    - a container in which to mix salt and water
    - an electric current of 6 to 24 Volts (such as a car, jeep, lorry battery or even photovoltaic solar panels)


1 - Cut off the bottom of the plastic bottle (A- where cut off)


2 - Take the charcoal out the torch with tweezers. With a candle flame, melt away any wax residues. Clean the charcoal with a piece of paper.
    Make a hole in the bottle's screw top, big enough in order for the charcoal stick to be inserted; if necessary, seal the charcoal stick with a few drops of candle wax or silicone;

B the candle wax
C the charcoal
D the bottle top


3 - Screw the bottle top back on;

Take 1.5 litres of water and add a handful of salt (about 100 gr.)

Mix well until the salt is entirely dissolved into the water.

Pour the solution into the prepared bottle - right up to the top (F- water level)


Connect the tip and the negative (black) electrode (without the plastic covering) must be placed into the water.

What happens :

   From the charcoal, bubbles of gas will develop (chlorine) that will then transform the salty water into disinfectant bleach. The smaller the bubbles, the better the reaction. The wider the diameter of the carbon stick, the smaller the bubbles will be.

Even the black wire will produce bubbles but they will be of hydrogen and will not be of any use..

After about one hour of reaction, the bleach will be concentrated enough. The reaction can be left for up to two hours. By then the liquid solution will be yellowish and will produce the typical smell of chlorine..

G battery
H chlorine bubbles
I hydrogen bubbles


General formula: 1 handful of salt + 1 litre of water + 1 hour = 1 litre bleach

Here is an example of how to make water drinkable :

To disinfect 5 litres of water add enough bleach to get a slight taste of chlorine (about 2 to 3 tablespoons) mix very, very well - because it's the contact of the chlorine with the water molecules that disinfect, and not the density of chlorine in the water.

Try tasting the water again after about 20 minutes. You may add some more bleach to get the slight chlorine taste - this will ensure the water remains sterile until its use. Remember, chlorine will be consumed in the presence of bacteria and micro-organisms.

Thank you to Home Made Javel Water for his useful trick.
You may contact him :

Download the full page in pdf HERE


Author's page : How to make Sodium Hypochlorite
How to make Sodium Hypochlorite (thanks to a Solar Kit)

Water purification methods

Produce sodium hypochlorite by electrolysis

The sodium hypochlorite is a very useful disinfectant, widely used in various contexts, especially for water purification. It’s easy to produce it if you have electric power. It is possible to produce sodium hypochlorite to about 5% by electrolysis.


The transaction must take place outdoors or in a very airy place because of dangerous chlorine gas that develops.

In order to let the electrolytic process take place, it is necessary a plastic container of 1.5 - 2 liters, a source of DC power that is able to deliver at least 6 Volts at 1 Ampere (one 12V battery for cars is fine, or a solar panel is even better), as well as a carbon electrode for the anode (+, positive) (it is possible to use mines for pencils, made of graphite). For the cathode*(-, negative or ground) it is possible to use directly the copper wire (in blue on the photos and video). The surface of the electrodes must be as wide as possible.


For long operative periods, it is better to make also the cathode with graphite, to avoid corrosion problems.

With one liter of water, one hand of salt and 2 hours of electric power at 12V from a battery, you can have 1 liter of solution with sodium hypochlorite.
With a 12 Volts battery you can make a fast electrolysis, but if you need to produce chlorine off-grid, it can be useful to use a solar panel.

Electrolysis Process

ANODE: carbon electrode (mines for pencils) 

CATHODE: copper wire* (the copper wire inside the liquid must have the plastic coating removed)


Checking Chlorine Concentration

Chlorine Test Strip

Chlorine Test Results


How to build the solar kit to produce Sodium Hypochlorite

The process to make the kit is quite easy :

  -  Cut a plastic bottle and secure it to a wooden support or other material, which allows a vertical position of the same.
  -  Attach a copper wire to graphite anode and place it in the plastic bottle cap.
  -  Remember to waterproof the hole with melted wax or with silicone.
  -  Create watertight connectors between the wires of the electrodes and the solar panel (minimum output of the solar panel should be 6 Volts at 1 Ampere).
  -  Put the solution of water and kitchen salt in the kit bottle and place it at sunlight.
  -  Immerse the copper wire of the cathode in the solution.
  -  Wait 2-8 hours and control concentration you need in the solution.

Video Tutorial: How to make Solar Kit for Water Purification :

Video not working ? Watch it   >> HERE << 


The kit and the tutorial was developed by GESTA and Geographical Research Association for Tregoo's Charity Program, to support the needs of the disadvantaged countries, where not potable water continually reaps victims.
Spread this video to allow the construction of the solar kit everywhere in the world.


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