This is the only laundry soap we've used for 1 1/2 years now. We love it! And we love the price even more! It takes me about 20 minutes to whip up a new batch - it's definitely worth a try!
1 Bar Fels Naptha Soap
1 cup Borax
1 cup Arm and Hammer Super Washing Soda
a measuring cup
a stirring spoon
a cheese grater
a large pot
some sort of 5 gallon container
Pour 6 cups of water into your pot and heat it just shy of boiling. You want it warm enough to melt the soap, but not enough to boil over.
While the water is warming, grate the bar of soap into small pieces. I took a picture of this, but it didn't turn out, but my plate of grated soap looked exactly like a plate of grated cheese!
Add the shredded soap to the pot of heated water. Stir the mixture until the soap is completely melted.
Once the soap is melted, add 1 cup Borax and 1 cup Washing Soda to the melted soap mixture. Stir until dissolved. (This is where your soap might boil over if you're not careful!)
Pour three gallons of hot water into the 5-gallon container, then add in the melted soap mixture from the stove top. Mix everything together.
Now that everything is mixed and dissolved, cover your 5-gallon container and place it somewhere it won't be disturbed. Let is cool over night. It will begin to gel as it cools. It does not gel uniformly so the next day it will look like Egg Drop soup. Pour into storage containers. Use 1/2 cup per regular laundry load.