What do you need for 2.5 litres of homemade liquid laundry detergent?
45 grams of washing soda
45 grams of neutral soap bar
2.5 litres of water
Put a big pot (a soup pot, for example) on the stove. Add the 2.5 litres of water and put the heat on high. Wait until the water boils.
Grate the 45 grams of the soap bar and add this to the water. Stir it through until the soap has dissolved completely.
Add the 45 grams of washing soda to the boiling water as well. Again, stir it through until the soda has completely dissolved, too.
Turn off the heat and leave the mixture alone for at least 12 hours.
After the 12 hours are up, the mixture will have become thicker. Pour it into a big plastic container to store it.
This amount of detergent will definitely be enough for at least 40 loads of laundry!
Note: make sure the drum of your washing machine is made out of stainless steel! If it’s made of aluminium, the washing soda might damage it. Most modern washing machines are made of stainless steel, luckily.