Grate fels naptha laundry soap
Any borax will do, and super washing soda
Five gallon bucket
Melt the fels-naphtha laundry soap (2/3 of a bar) in 3 pints water on medium high heat, then add 1 cup borax and 1 cup super washing soda, stir thoroughly until all ingredients are dissolved, turn to medium heat and stir for 15 minutes, it will become the consistency of honey, then put 2 quarts hot water in the 5 gallon bucket and add the soap mixture, mix well, then add 11 quarts of cold water. Let stand for 24 hours before using. I stir it about once a week or so. (I have used it before the 24 hours and it worked fine.)
The finished product (four gallons). Use 1/2 cup in a regular washing machine and 1/4 cup in a front loader.