I use this laundry detergent with a little change. I make it twice as strong. Here is the recipe:
One bar Fels Naptha Soap grated
One cup 20 Mule Team Borax
1/2 cup Washing Soda (NOT baking Soda)
Melt the Fels Napth Soap on the stove with water.
Put in bucket and stir in other ingedients
add water to fill to 1/2 of a 5 gallon bucket.
Stir
Let sit over night.
Add water to fill to top of 5 gallon bucket
Stir
Fill containers.
Use 1/2 cup per load.
Use 1/2 cup per load.