The recipe calls for;
1 cup of soap - I just grated 1 bar
1/2 cup of borax - I did not add this it's no good for grey water systems and reusing on the garden.
1/2 cup of washing soda
Both the soap and the washing soda were easily located in the laudry isle at Coles. I found the soap grated easily I thought it may have been tricky but it grates well.
Basically the soap is added to 1.5 litres of water and you keep stiring until soap is dissolved, then add the washing soda. Stir until thickened then pop in a bucket and fill with warm water to combine all ingredients. I did add about 15 drops of Lemon Eucalyptus essential oil as I wanted a very subtle scent.
The end result was around 7 litres of washing detergent. Total cost for making this $2 and 15 minutes of time. Bliss!! I keep a coffee cup in the laundry and use a medium cupful of the detergent per load, you must shake the bottle first but it's washing the clothes really well. There are no suds, but we always used the Earths Choice detergent and there are no suds in that either which. Is certainly preferable when your using it on your garden. I do about 17-19 large loads per week - 3 sons and a massage business generating tons of towels!